root / hw / exynos4210_mct.c @ 206e7f20
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/*
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* Samsung exynos4210 Multi Core timer
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*
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* Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
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* All rights reserved.
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*
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* Evgeny Voevodin <e.voevodin@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Global Timer:
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*
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* Consists of two timers. First represents Free Running Counter and second
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* is used to measure interval from FRC to nearest comparator.
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*
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* 0 UINT64_MAX
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* | timer0 |
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* | <-------------------------------------------------------------- |
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* | --------------------------------------------frc---------------> |
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* |______________________________________________|__________________|
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* CMP0 CMP1 CMP2 | CMP3
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* __| |_
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* | timer1 |
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* | -------------> |
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* frc CMPx
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*
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* Problem: when implementing global timer as is, overflow arises.
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* next_time = cur_time + period * count;
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* period and count are 64 bits width.
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* Lets arm timer for MCT_GT_COUNTER_STEP count and update internal G_CNT
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* register during each event.
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*
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* Problem: both timers need to be implemented using MCT_XT_COUNTER_STEP because
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* local timer contains two counters: TCNT and ICNT. TCNT == 0 -> ICNT--.
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* IRQ is generated when ICNT riches zero. Implementation where TCNT == 0
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* generates IRQs suffers from too frequently events. Better to have one
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* uint64_t counter equal to TCNT*ICNT and arm ptimer.c for a minimum(TCNT*ICNT,
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* MCT_GT_COUNTER_STEP); (yes, if target tunes ICNT * TCNT to be too low values,
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* there is no way to avoid frequently events).
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*/
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#include "sysbus.h" |
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#include "qemu-timer.h" |
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#include "qemu-common.h" |
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#include "ptimer.h" |
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#include "exynos4210.h" |
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//#define DEBUG_MCT
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#ifdef DEBUG_MCT
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#define DPRINTF(fmt, ...) \
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do { fprintf(stdout, "MCT: [%24s:%5d] " fmt, __func__, __LINE__, \ |
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## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) do {} while (0) |
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#endif
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#define MCT_CFG 0x000 |
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#define G_CNT_L 0x100 |
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#define G_CNT_U 0x104 |
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#define G_CNT_WSTAT 0x110 |
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#define G_COMP0_L 0x200 |
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#define G_COMP0_U 0x204 |
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#define G_COMP0_ADD_INCR 0x208 |
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#define G_COMP1_L 0x210 |
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#define G_COMP1_U 0x214 |
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#define G_COMP1_ADD_INCR 0x218 |
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#define G_COMP2_L 0x220 |
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#define G_COMP2_U 0x224 |
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#define G_COMP2_ADD_INCR 0x228 |
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#define G_COMP3_L 0x230 |
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#define G_COMP3_U 0x234 |
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#define G_COMP3_ADD_INCR 0x238 |
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#define G_TCON 0x240 |
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#define G_INT_CSTAT 0x244 |
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#define G_INT_ENB 0x248 |
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#define G_WSTAT 0x24C |
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#define L0_TCNTB 0x300 |
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#define L0_TCNTO 0x304 |
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#define L0_ICNTB 0x308 |
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#define L0_ICNTO 0x30C |
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#define L0_FRCNTB 0x310 |
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#define L0_FRCNTO 0x314 |
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#define L0_TCON 0x320 |
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#define L0_INT_CSTAT 0x330 |
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#define L0_INT_ENB 0x334 |
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#define L0_WSTAT 0x340 |
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#define L1_TCNTB 0x400 |
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#define L1_TCNTO 0x404 |
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#define L1_ICNTB 0x408 |
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#define L1_ICNTO 0x40C |
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#define L1_FRCNTB 0x410 |
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#define L1_FRCNTO 0x414 |
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#define L1_TCON 0x420 |
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#define L1_INT_CSTAT 0x430 |
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#define L1_INT_ENB 0x434 |
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#define L1_WSTAT 0x440 |
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#define MCT_CFG_GET_PRESCALER(x) ((x) & 0xFF) |
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#define MCT_CFG_GET_DIVIDER(x) (1 << ((x) >> 8 & 7)) |
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#define GET_G_COMP_IDX(offset) (((offset) - G_COMP0_L) / 0x10) |
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#define GET_G_COMP_ADD_INCR_IDX(offset) (((offset) - G_COMP0_ADD_INCR) / 0x10) |
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#define G_COMP_L(x) (G_COMP0_L + (x) * 0x10) |
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#define G_COMP_U(x) (G_COMP0_U + (x) * 0x10) |
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#define G_COMP_ADD_INCR(x) (G_COMP0_ADD_INCR + (x) * 0x10) |
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/* MCT bits */
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#define G_TCON_COMP_ENABLE(x) (1 << 2 * (x)) |
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#define G_TCON_AUTO_ICREMENT(x) (1 << (2 * (x) + 1)) |
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#define G_TCON_TIMER_ENABLE (1 << 8) |
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#define G_INT_ENABLE(x) (1 << (x)) |
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#define G_INT_CSTAT_COMP(x) (1 << (x)) |
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#define G_CNT_WSTAT_L 1 |
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#define G_CNT_WSTAT_U 2 |
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#define G_WSTAT_COMP_L(x) (1 << 4 * (x)) |
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#define G_WSTAT_COMP_U(x) (1 << ((4 * (x)) + 1)) |
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#define G_WSTAT_COMP_ADDINCR(x) (1 << ((4 * (x)) + 2)) |
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#define G_WSTAT_TCON_WRITE (1 << 16) |
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#define GET_L_TIMER_IDX(offset) ((((offset) & 0xF00) - L0_TCNTB) / 0x100) |
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#define GET_L_TIMER_CNT_REG_IDX(offset, lt_i) \
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(((offset) - (L0_TCNTB + 0x100 * (lt_i))) >> 2) |
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#define L_ICNTB_MANUAL_UPDATE (1 << 31) |
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#define L_TCON_TICK_START (1) |
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#define L_TCON_INT_START (1 << 1) |
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#define L_TCON_INTERVAL_MODE (1 << 2) |
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#define L_TCON_FRC_START (1 << 3) |
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#define L_INT_CSTAT_INTCNT (1 << 0) |
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#define L_INT_CSTAT_FRCCNT (1 << 1) |
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#define L_INT_INTENB_ICNTEIE (1 << 0) |
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#define L_INT_INTENB_FRCEIE (1 << 1) |
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#define L_WSTAT_TCNTB_WRITE (1 << 0) |
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#define L_WSTAT_ICNTB_WRITE (1 << 1) |
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#define L_WSTAT_FRCCNTB_WRITE (1 << 2) |
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#define L_WSTAT_TCON_WRITE (1 << 3) |
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enum LocalTimerRegCntIndexes {
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L_REG_CNT_TCNTB, |
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L_REG_CNT_TCNTO, |
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L_REG_CNT_ICNTB, |
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L_REG_CNT_ICNTO, |
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L_REG_CNT_FRCCNTB, |
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L_REG_CNT_FRCCNTO, |
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L_REG_CNT_AMOUNT |
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}; |
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#define MCT_NIRQ 6 |
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#define MCT_SFR_SIZE 0x444 |
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#define MCT_GT_CMP_NUM 4 |
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#define MCT_GT_MAX_VAL UINT64_MAX
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#define MCT_GT_COUNTER_STEP 0x100000000ULL |
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#define MCT_LT_COUNTER_STEP 0x100000000ULL |
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#define MCT_LT_CNT_LOW_LIMIT 0x100 |
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/* global timer */
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typedef struct { |
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qemu_irq irq[MCT_GT_CMP_NUM]; |
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struct gregs {
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uint64_t cnt; |
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uint32_t cnt_wstat; |
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uint32_t tcon; |
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uint32_t int_cstat; |
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uint32_t int_enb; |
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uint32_t wstat; |
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uint64_t comp[MCT_GT_CMP_NUM]; |
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uint32_t comp_add_incr[MCT_GT_CMP_NUM]; |
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} reg; |
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uint64_t count; /* Value FRC was armed with */
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int32_t curr_comp; /* Current comparator FRC is running to */
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ptimer_state *ptimer_frc; /* FRC timer */
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} Exynos4210MCTGT; |
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/* local timer */
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typedef struct { |
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int id; /* timer id */ |
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qemu_irq irq; /* local timer irq */
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struct tick_timer {
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uint32_t cnt_run; /* cnt timer is running */
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uint32_t int_run; /* int timer is running */
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uint32_t last_icnto; |
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uint32_t last_tcnto; |
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uint32_t tcntb; /* initial value for TCNTB */
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uint32_t icntb; /* initial value for ICNTB */
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/* for step mode */
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uint64_t distance; /* distance to count to the next event */
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uint64_t progress; /* progress when counting by steps */
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uint64_t count; /* count to arm timer with */
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ptimer_state *ptimer_tick; /* timer for tick counter */
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} tick_timer; |
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/* use ptimer.c to represent count down timer */
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ptimer_state *ptimer_frc; /* timer for free running counter */
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/* registers */
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struct lregs {
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uint32_t cnt[L_REG_CNT_AMOUNT]; |
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uint32_t tcon; |
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uint32_t int_cstat; |
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uint32_t int_enb; |
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uint32_t wstat; |
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} reg; |
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} Exynos4210MCTLT; |
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typedef struct Exynos4210MCTState { |
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SysBusDevice busdev; |
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MemoryRegion iomem; |
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/* Registers */
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uint32_t reg_mct_cfg; |
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Exynos4210MCTLT l_timer[2];
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Exynos4210MCTGT g_timer; |
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uint32_t freq; /* all timers tick frequency, TCLK */
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} Exynos4210MCTState; |
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|
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/*** VMState ***/
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static const VMStateDescription vmstate_tick_timer = { |
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.name = "exynos4210.mct.tick_timer",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(cnt_run, struct tick_timer),
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VMSTATE_UINT32(int_run, struct tick_timer),
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VMSTATE_UINT32(last_icnto, struct tick_timer),
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VMSTATE_UINT32(last_tcnto, struct tick_timer),
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VMSTATE_UINT32(tcntb, struct tick_timer),
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VMSTATE_UINT32(icntb, struct tick_timer),
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VMSTATE_UINT64(distance, struct tick_timer),
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VMSTATE_UINT64(progress, struct tick_timer),
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VMSTATE_UINT64(count, struct tick_timer),
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VMSTATE_PTIMER(ptimer_tick, struct tick_timer),
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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static const VMStateDescription vmstate_lregs = { |
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.name = "exynos4210.mct.lregs",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32_ARRAY(cnt, struct lregs, L_REG_CNT_AMOUNT),
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VMSTATE_UINT32(tcon, struct lregs),
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VMSTATE_UINT32(int_cstat, struct lregs),
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VMSTATE_UINT32(int_enb, struct lregs),
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VMSTATE_UINT32(wstat, struct lregs),
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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static const VMStateDescription vmstate_exynos4210_mct_lt = { |
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.name = "exynos4210.mct.lt",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_INT32(id, Exynos4210MCTLT), |
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VMSTATE_STRUCT(tick_timer, Exynos4210MCTLT, 0,
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vmstate_tick_timer, |
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struct tick_timer),
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VMSTATE_PTIMER(ptimer_frc, Exynos4210MCTLT), |
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VMSTATE_STRUCT(reg, Exynos4210MCTLT, 0,
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vmstate_lregs, |
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struct lregs),
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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|
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static const VMStateDescription vmstate_gregs = { |
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.name = "exynos4210.mct.lregs",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64(cnt, struct gregs),
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VMSTATE_UINT32(cnt_wstat, struct gregs),
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VMSTATE_UINT32(tcon, struct gregs),
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VMSTATE_UINT32(int_cstat, struct gregs),
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VMSTATE_UINT32(int_enb, struct gregs),
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VMSTATE_UINT32(wstat, struct gregs),
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VMSTATE_UINT64_ARRAY(comp, struct gregs, MCT_GT_CMP_NUM),
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VMSTATE_UINT32_ARRAY(comp_add_incr, struct gregs,
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MCT_GT_CMP_NUM), |
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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|
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static const VMStateDescription vmstate_exynos4210_mct_gt = { |
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.name = "exynos4210.mct.lt",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_STRUCT(reg, Exynos4210MCTGT, 0, vmstate_gregs,
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struct gregs),
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VMSTATE_UINT64(count, Exynos4210MCTGT), |
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VMSTATE_INT32(curr_comp, Exynos4210MCTGT), |
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VMSTATE_PTIMER(ptimer_frc, Exynos4210MCTGT), |
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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|
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static const VMStateDescription vmstate_exynos4210_mct_state = { |
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.name = "exynos4210.mct",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(reg_mct_cfg, Exynos4210MCTState), |
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VMSTATE_STRUCT_ARRAY(l_timer, Exynos4210MCTState, 2, 0, |
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vmstate_exynos4210_mct_lt, Exynos4210MCTLT), |
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VMSTATE_STRUCT(g_timer, Exynos4210MCTState, 0,
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vmstate_exynos4210_mct_gt, Exynos4210MCTGT), |
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VMSTATE_UINT32(freq, Exynos4210MCTState), |
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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|
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static void exynos4210_mct_update_freq(Exynos4210MCTState *s); |
| 361 |
|
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/*
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* Set counter of FRC global timer.
|
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*/
|
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static void exynos4210_gfrc_set_count(Exynos4210MCTGT *s, uint64_t count) |
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{
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s->count = count; |
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DPRINTF("global timer frc set count 0x%llx\n", count);
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ptimer_set_count(s->ptimer_frc, count); |
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} |
| 371 |
|
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/*
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* Get counter of FRC global timer.
|
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*/
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static uint64_t exynos4210_gfrc_get_count(Exynos4210MCTGT *s)
|
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{
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uint64_t count = 0;
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count = ptimer_get_count(s->ptimer_frc); |
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count = s->count - count; |
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return s->reg.cnt + count;
|
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} |
| 382 |
|
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/*
|
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* Stop global FRC timer
|
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*/
|
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static void exynos4210_gfrc_stop(Exynos4210MCTGT *s) |
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{
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DPRINTF("global timer frc stop\n");
|
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|
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ptimer_stop(s->ptimer_frc); |
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} |
| 392 |
|
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/*
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* Start global FRC timer
|
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*/
|
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static void exynos4210_gfrc_start(Exynos4210MCTGT *s) |
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{
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DPRINTF("global timer frc start\n");
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|
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ptimer_run(s->ptimer_frc, 1);
|
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} |
| 402 |
|
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/*
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* Find next nearest Comparator. If current Comparator value equals to other
|
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* Comparator value, skip them both
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*/
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static int32_t exynos4210_gcomp_find(Exynos4210MCTState *s)
|
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{
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int res;
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int i;
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int enabled;
|
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uint64_t min; |
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int min_comp_i;
|
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uint64_t gfrc; |
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uint64_t distance; |
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uint64_t distance_min; |
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int comp_i;
|
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|
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/* get gfrc count */
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gfrc = exynos4210_gfrc_get_count(&s->g_timer); |
| 421 |
|
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min = UINT64_MAX; |
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distance_min = UINT64_MAX; |
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comp_i = MCT_GT_CMP_NUM; |
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min_comp_i = MCT_GT_CMP_NUM; |
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enabled = 0;
|
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|
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/* lookup for nearest comparator */
|
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for (i = 0; i < MCT_GT_CMP_NUM; i++) { |
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|
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if (s->g_timer.reg.tcon & G_TCON_COMP_ENABLE(i)) {
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|
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enabled = 1;
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|
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if (s->g_timer.reg.comp[i] > gfrc) {
|
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/* Comparator is upper then FRC */
|
| 437 |
distance = s->g_timer.reg.comp[i] - gfrc; |
| 438 |
|
| 439 |
if (distance <= distance_min) {
|
| 440 |
distance_min = distance; |
| 441 |
comp_i = i; |
| 442 |
} |
| 443 |
} else {
|
| 444 |
/* Comparator is below FRC, find the smallest */
|
| 445 |
|
| 446 |
if (s->g_timer.reg.comp[i] <= min) {
|
| 447 |
min = s->g_timer.reg.comp[i]; |
| 448 |
min_comp_i = i; |
| 449 |
} |
| 450 |
} |
| 451 |
} |
| 452 |
} |
| 453 |
|
| 454 |
if (!enabled) {
|
| 455 |
/* All Comparators disabled */
|
| 456 |
res = -1;
|
| 457 |
} else if (comp_i < MCT_GT_CMP_NUM) { |
| 458 |
/* Found upper Comparator */
|
| 459 |
res = comp_i; |
| 460 |
} else {
|
| 461 |
/* All Comparators are below or equal to FRC */
|
| 462 |
res = min_comp_i; |
| 463 |
} |
| 464 |
|
| 465 |
DPRINTF("found comparator %d: comp 0x%llx distance 0x%llx, gfrc 0x%llx\n",
|
| 466 |
res, |
| 467 |
s->g_timer.reg.comp[res], |
| 468 |
distance_min, |
| 469 |
gfrc); |
| 470 |
|
| 471 |
return res;
|
| 472 |
} |
| 473 |
|
| 474 |
/*
|
| 475 |
* Get distance to nearest Comparator
|
| 476 |
*/
|
| 477 |
static uint64_t exynos4210_gcomp_get_distance(Exynos4210MCTState *s, int32_t id)
|
| 478 |
{
|
| 479 |
if (id == -1) { |
| 480 |
/* no enabled Comparators, choose max distance */
|
| 481 |
return MCT_GT_COUNTER_STEP;
|
| 482 |
} |
| 483 |
if (s->g_timer.reg.comp[id] - s->g_timer.reg.cnt < MCT_GT_COUNTER_STEP) {
|
| 484 |
return s->g_timer.reg.comp[id] - s->g_timer.reg.cnt;
|
| 485 |
} else {
|
| 486 |
return MCT_GT_COUNTER_STEP;
|
| 487 |
} |
| 488 |
} |
| 489 |
|
| 490 |
/*
|
| 491 |
* Restart global FRC timer
|
| 492 |
*/
|
| 493 |
static void exynos4210_gfrc_restart(Exynos4210MCTState *s) |
| 494 |
{
|
| 495 |
uint64_t distance; |
| 496 |
|
| 497 |
exynos4210_gfrc_stop(&s->g_timer); |
| 498 |
|
| 499 |
s->g_timer.curr_comp = exynos4210_gcomp_find(s); |
| 500 |
|
| 501 |
distance = exynos4210_gcomp_get_distance(s, s->g_timer.curr_comp); |
| 502 |
|
| 503 |
if (distance > MCT_GT_COUNTER_STEP || !distance) {
|
| 504 |
distance = MCT_GT_COUNTER_STEP; |
| 505 |
} |
| 506 |
|
| 507 |
exynos4210_gfrc_set_count(&s->g_timer, distance); |
| 508 |
exynos4210_gfrc_start(&s->g_timer); |
| 509 |
} |
| 510 |
|
| 511 |
/*
|
| 512 |
* Raise global timer CMP IRQ
|
| 513 |
*/
|
| 514 |
static void exynos4210_gcomp_raise_irq(void *opaque, uint32_t id) |
| 515 |
{
|
| 516 |
Exynos4210MCTGT *s = opaque; |
| 517 |
|
| 518 |
/* If CSTAT is pending and IRQ is enabled */
|
| 519 |
if ((s->reg.int_cstat & G_INT_CSTAT_COMP(id)) &&
|
| 520 |
(s->reg.int_enb & G_INT_ENABLE(id))) {
|
| 521 |
DPRINTF("gcmp timer[%d] IRQ\n", id);
|
| 522 |
qemu_irq_raise(s->irq[id]); |
| 523 |
} |
| 524 |
} |
| 525 |
|
| 526 |
/*
|
| 527 |
* Lower global timer CMP IRQ
|
| 528 |
*/
|
| 529 |
static void exynos4210_gcomp_lower_irq(void *opaque, uint32_t id) |
| 530 |
{
|
| 531 |
Exynos4210MCTGT *s = opaque; |
| 532 |
qemu_irq_lower(s->irq[id]); |
| 533 |
} |
| 534 |
|
| 535 |
/*
|
| 536 |
* Global timer FRC event handler.
|
| 537 |
* Each event occurs when internal counter reaches counter + MCT_GT_COUNTER_STEP
|
| 538 |
* Every time we arm global FRC timer to count for MCT_GT_COUNTER_STEP value
|
| 539 |
*/
|
| 540 |
static void exynos4210_gfrc_event(void *opaque) |
| 541 |
{
|
| 542 |
Exynos4210MCTState *s = (Exynos4210MCTState *)opaque; |
| 543 |
int i;
|
| 544 |
uint64_t distance; |
| 545 |
|
| 546 |
DPRINTF("\n");
|
| 547 |
|
| 548 |
s->g_timer.reg.cnt += s->g_timer.count; |
| 549 |
|
| 550 |
/* Process all comparators */
|
| 551 |
for (i = 0; i < MCT_GT_CMP_NUM; i++) { |
| 552 |
|
| 553 |
if (s->g_timer.reg.cnt == s->g_timer.reg.comp[i]) {
|
| 554 |
/* reached nearest comparator */
|
| 555 |
|
| 556 |
s->g_timer.reg.int_cstat |= G_INT_CSTAT_COMP(i); |
| 557 |
|
| 558 |
/* Auto increment */
|
| 559 |
if (s->g_timer.reg.tcon & G_TCON_AUTO_ICREMENT(i)) {
|
| 560 |
s->g_timer.reg.comp[i] += s->g_timer.reg.comp_add_incr[i]; |
| 561 |
} |
| 562 |
|
| 563 |
/* IRQ */
|
| 564 |
exynos4210_gcomp_raise_irq(&s->g_timer, i); |
| 565 |
} |
| 566 |
} |
| 567 |
|
| 568 |
/* Reload FRC to reach nearest comparator */
|
| 569 |
s->g_timer.curr_comp = exynos4210_gcomp_find(s); |
| 570 |
distance = exynos4210_gcomp_get_distance(s, s->g_timer.curr_comp); |
| 571 |
if (distance > MCT_GT_COUNTER_STEP) {
|
| 572 |
distance = MCT_GT_COUNTER_STEP; |
| 573 |
} |
| 574 |
exynos4210_gfrc_set_count(&s->g_timer, distance); |
| 575 |
|
| 576 |
exynos4210_gfrc_start(&s->g_timer); |
| 577 |
|
| 578 |
return;
|
| 579 |
} |
| 580 |
|
| 581 |
/*
|
| 582 |
* Get counter of FRC local timer.
|
| 583 |
*/
|
| 584 |
static uint64_t exynos4210_lfrc_get_count(Exynos4210MCTLT *s)
|
| 585 |
{
|
| 586 |
return ptimer_get_count(s->ptimer_frc);
|
| 587 |
} |
| 588 |
|
| 589 |
/*
|
| 590 |
* Set counter of FRC local timer.
|
| 591 |
*/
|
| 592 |
static void exynos4210_lfrc_update_count(Exynos4210MCTLT *s) |
| 593 |
{
|
| 594 |
if (!s->reg.cnt[L_REG_CNT_FRCCNTB]) {
|
| 595 |
ptimer_set_count(s->ptimer_frc, MCT_LT_COUNTER_STEP); |
| 596 |
} else {
|
| 597 |
ptimer_set_count(s->ptimer_frc, s->reg.cnt[L_REG_CNT_FRCCNTB]); |
| 598 |
} |
| 599 |
} |
| 600 |
|
| 601 |
/*
|
| 602 |
* Start local FRC timer
|
| 603 |
*/
|
| 604 |
static void exynos4210_lfrc_start(Exynos4210MCTLT *s) |
| 605 |
{
|
| 606 |
ptimer_run(s->ptimer_frc, 1);
|
| 607 |
} |
| 608 |
|
| 609 |
/*
|
| 610 |
* Stop local FRC timer
|
| 611 |
*/
|
| 612 |
static void exynos4210_lfrc_stop(Exynos4210MCTLT *s) |
| 613 |
{
|
| 614 |
ptimer_stop(s->ptimer_frc); |
| 615 |
} |
| 616 |
|
| 617 |
/*
|
| 618 |
* Local timer free running counter tick handler
|
| 619 |
*/
|
| 620 |
static void exynos4210_lfrc_event(void *opaque) |
| 621 |
{
|
| 622 |
Exynos4210MCTLT * s = (Exynos4210MCTLT *)opaque; |
| 623 |
|
| 624 |
/* local frc expired */
|
| 625 |
|
| 626 |
DPRINTF("\n");
|
| 627 |
|
| 628 |
s->reg.int_cstat |= L_INT_CSTAT_FRCCNT; |
| 629 |
|
| 630 |
/* update frc counter */
|
| 631 |
exynos4210_lfrc_update_count(s); |
| 632 |
|
| 633 |
/* raise irq */
|
| 634 |
if (s->reg.int_enb & L_INT_INTENB_FRCEIE) {
|
| 635 |
qemu_irq_raise(s->irq); |
| 636 |
} |
| 637 |
|
| 638 |
/* we reached here, this means that timer is enabled */
|
| 639 |
exynos4210_lfrc_start(s); |
| 640 |
} |
| 641 |
|
| 642 |
static uint32_t exynos4210_ltick_int_get_cnto(struct tick_timer *s); |
| 643 |
static uint32_t exynos4210_ltick_cnt_get_cnto(struct tick_timer *s); |
| 644 |
static void exynos4210_ltick_recalc_count(struct tick_timer *s); |
| 645 |
|
| 646 |
/*
|
| 647 |
* Action on enabling local tick int timer
|
| 648 |
*/
|
| 649 |
static void exynos4210_ltick_int_start(struct tick_timer *s) |
| 650 |
{
|
| 651 |
if (!s->int_run) {
|
| 652 |
s->int_run = 1;
|
| 653 |
} |
| 654 |
} |
| 655 |
|
| 656 |
/*
|
| 657 |
* Action on disabling local tick int timer
|
| 658 |
*/
|
| 659 |
static void exynos4210_ltick_int_stop(struct tick_timer *s) |
| 660 |
{
|
| 661 |
if (s->int_run) {
|
| 662 |
s->last_icnto = exynos4210_ltick_int_get_cnto(s); |
| 663 |
s->int_run = 0;
|
| 664 |
} |
| 665 |
} |
| 666 |
|
| 667 |
/*
|
| 668 |
* Get count for INT timer
|
| 669 |
*/
|
| 670 |
static uint32_t exynos4210_ltick_int_get_cnto(struct tick_timer *s) |
| 671 |
{
|
| 672 |
uint32_t icnto; |
| 673 |
uint64_t remain; |
| 674 |
uint64_t count; |
| 675 |
uint64_t counted; |
| 676 |
uint64_t cur_progress; |
| 677 |
|
| 678 |
count = ptimer_get_count(s->ptimer_tick); |
| 679 |
if (count) {
|
| 680 |
/* timer is still counting, called not from event */
|
| 681 |
counted = s->count - ptimer_get_count(s->ptimer_tick); |
| 682 |
cur_progress = s->progress + counted; |
| 683 |
} else {
|
| 684 |
/* timer expired earlier */
|
| 685 |
cur_progress = s->progress; |
| 686 |
} |
| 687 |
|
| 688 |
remain = s->distance - cur_progress; |
| 689 |
|
| 690 |
if (!s->int_run) {
|
| 691 |
/* INT is stopped. */
|
| 692 |
icnto = s->last_icnto; |
| 693 |
} else {
|
| 694 |
/* Both are counting */
|
| 695 |
icnto = remain / s->tcntb; |
| 696 |
} |
| 697 |
|
| 698 |
return icnto;
|
| 699 |
} |
| 700 |
|
| 701 |
/*
|
| 702 |
* Start local tick cnt timer.
|
| 703 |
*/
|
| 704 |
static void exynos4210_ltick_cnt_start(struct tick_timer *s) |
| 705 |
{
|
| 706 |
if (!s->cnt_run) {
|
| 707 |
|
| 708 |
exynos4210_ltick_recalc_count(s); |
| 709 |
ptimer_set_count(s->ptimer_tick, s->count); |
| 710 |
ptimer_run(s->ptimer_tick, 1);
|
| 711 |
|
| 712 |
s->cnt_run = 1;
|
| 713 |
} |
| 714 |
} |
| 715 |
|
| 716 |
/*
|
| 717 |
* Stop local tick cnt timer.
|
| 718 |
*/
|
| 719 |
static void exynos4210_ltick_cnt_stop(struct tick_timer *s) |
| 720 |
{
|
| 721 |
if (s->cnt_run) {
|
| 722 |
|
| 723 |
s->last_tcnto = exynos4210_ltick_cnt_get_cnto(s); |
| 724 |
|
| 725 |
if (s->int_run) {
|
| 726 |
exynos4210_ltick_int_stop(s); |
| 727 |
} |
| 728 |
|
| 729 |
ptimer_stop(s->ptimer_tick); |
| 730 |
|
| 731 |
s->cnt_run = 0;
|
| 732 |
} |
| 733 |
} |
| 734 |
|
| 735 |
/*
|
| 736 |
* Get counter for CNT timer
|
| 737 |
*/
|
| 738 |
static uint32_t exynos4210_ltick_cnt_get_cnto(struct tick_timer *s) |
| 739 |
{
|
| 740 |
uint32_t tcnto; |
| 741 |
uint32_t icnto; |
| 742 |
uint64_t remain; |
| 743 |
uint64_t counted; |
| 744 |
uint64_t count; |
| 745 |
uint64_t cur_progress; |
| 746 |
|
| 747 |
count = ptimer_get_count(s->ptimer_tick); |
| 748 |
if (count) {
|
| 749 |
/* timer is still counting, called not from event */
|
| 750 |
counted = s->count - ptimer_get_count(s->ptimer_tick); |
| 751 |
cur_progress = s->progress + counted; |
| 752 |
} else {
|
| 753 |
/* timer expired earlier */
|
| 754 |
cur_progress = s->progress; |
| 755 |
} |
| 756 |
|
| 757 |
remain = s->distance - cur_progress; |
| 758 |
|
| 759 |
if (!s->cnt_run) {
|
| 760 |
/* Both are stopped. */
|
| 761 |
tcnto = s->last_tcnto; |
| 762 |
} else if (!s->int_run) { |
| 763 |
/* INT counter is stopped, progress is by CNT timer */
|
| 764 |
tcnto = remain % s->tcntb; |
| 765 |
} else {
|
| 766 |
/* Both are counting */
|
| 767 |
icnto = remain / s->tcntb; |
| 768 |
if (icnto) {
|
| 769 |
tcnto = remain % (icnto * s->tcntb); |
| 770 |
} else {
|
| 771 |
tcnto = remain % s->tcntb; |
| 772 |
} |
| 773 |
} |
| 774 |
|
| 775 |
return tcnto;
|
| 776 |
} |
| 777 |
|
| 778 |
/*
|
| 779 |
* Set new values of counters for CNT and INT timers
|
| 780 |
*/
|
| 781 |
static void exynos4210_ltick_set_cntb(struct tick_timer *s, uint32_t new_cnt, |
| 782 |
uint32_t new_int) |
| 783 |
{
|
| 784 |
uint32_t cnt_stopped = 0;
|
| 785 |
uint32_t int_stopped = 0;
|
| 786 |
|
| 787 |
if (s->cnt_run) {
|
| 788 |
exynos4210_ltick_cnt_stop(s); |
| 789 |
cnt_stopped = 1;
|
| 790 |
} |
| 791 |
|
| 792 |
if (s->int_run) {
|
| 793 |
exynos4210_ltick_int_stop(s); |
| 794 |
int_stopped = 1;
|
| 795 |
} |
| 796 |
|
| 797 |
s->tcntb = new_cnt + 1;
|
| 798 |
s->icntb = new_int + 1;
|
| 799 |
|
| 800 |
if (cnt_stopped) {
|
| 801 |
exynos4210_ltick_cnt_start(s); |
| 802 |
} |
| 803 |
if (int_stopped) {
|
| 804 |
exynos4210_ltick_int_start(s); |
| 805 |
} |
| 806 |
|
| 807 |
} |
| 808 |
|
| 809 |
/*
|
| 810 |
* Calculate new counter value for tick timer
|
| 811 |
*/
|
| 812 |
static void exynos4210_ltick_recalc_count(struct tick_timer *s) |
| 813 |
{
|
| 814 |
uint64_t to_count; |
| 815 |
|
| 816 |
if ((s->cnt_run && s->last_tcnto) || (s->int_run && s->last_icnto)) {
|
| 817 |
/*
|
| 818 |
* one or both timers run and not counted to the end;
|
| 819 |
* distance is not passed, recalculate with last_tcnto * last_icnto
|
| 820 |
*/
|
| 821 |
|
| 822 |
if (s->last_tcnto) {
|
| 823 |
to_count = s->last_tcnto * s->last_icnto; |
| 824 |
} else {
|
| 825 |
to_count = s->last_icnto; |
| 826 |
} |
| 827 |
} else {
|
| 828 |
/* distance is passed, recalculate with tcnto * icnto */
|
| 829 |
if (s->icntb) {
|
| 830 |
s->distance = s->tcntb * s->icntb; |
| 831 |
} else {
|
| 832 |
s->distance = s->tcntb; |
| 833 |
} |
| 834 |
|
| 835 |
to_count = s->distance; |
| 836 |
s->progress = 0;
|
| 837 |
} |
| 838 |
|
| 839 |
if (to_count > MCT_LT_COUNTER_STEP) {
|
| 840 |
/* count by step */
|
| 841 |
s->count = MCT_LT_COUNTER_STEP; |
| 842 |
} else {
|
| 843 |
s->count = to_count; |
| 844 |
} |
| 845 |
} |
| 846 |
|
| 847 |
/*
|
| 848 |
* Initialize tick_timer
|
| 849 |
*/
|
| 850 |
static void exynos4210_ltick_timer_init(struct tick_timer *s) |
| 851 |
{
|
| 852 |
exynos4210_ltick_int_stop(s); |
| 853 |
exynos4210_ltick_cnt_stop(s); |
| 854 |
|
| 855 |
s->count = 0;
|
| 856 |
s->distance = 0;
|
| 857 |
s->progress = 0;
|
| 858 |
s->icntb = 0;
|
| 859 |
s->tcntb = 0;
|
| 860 |
} |
| 861 |
|
| 862 |
/*
|
| 863 |
* tick_timer event.
|
| 864 |
* Raises when abstract tick_timer expires.
|
| 865 |
*/
|
| 866 |
static void exynos4210_ltick_timer_event(struct tick_timer *s) |
| 867 |
{
|
| 868 |
s->progress += s->count; |
| 869 |
} |
| 870 |
|
| 871 |
/*
|
| 872 |
* Local timer tick counter handler.
|
| 873 |
* Don't use reloaded timers. If timer counter = zero
|
| 874 |
* then handler called but after handler finished no
|
| 875 |
* timer reload occurs.
|
| 876 |
*/
|
| 877 |
static void exynos4210_ltick_event(void *opaque) |
| 878 |
{
|
| 879 |
Exynos4210MCTLT * s = (Exynos4210MCTLT *)opaque; |
| 880 |
uint32_t tcnto; |
| 881 |
uint32_t icnto; |
| 882 |
#ifdef DEBUG_MCT
|
| 883 |
static uint64_t time1[2] = {0}; |
| 884 |
static uint64_t time2[2] = {0}; |
| 885 |
#endif
|
| 886 |
|
| 887 |
/* Call tick_timer event handler, it will update its tcntb and icntb. */
|
| 888 |
exynos4210_ltick_timer_event(&s->tick_timer); |
| 889 |
|
| 890 |
/* get tick_timer cnt */
|
| 891 |
tcnto = exynos4210_ltick_cnt_get_cnto(&s->tick_timer); |
| 892 |
|
| 893 |
/* get tick_timer int */
|
| 894 |
icnto = exynos4210_ltick_int_get_cnto(&s->tick_timer); |
| 895 |
|
| 896 |
/* raise IRQ if needed */
|
| 897 |
if (!icnto && s->reg.tcon & L_TCON_INT_START) {
|
| 898 |
/* INT counter enabled and expired */
|
| 899 |
|
| 900 |
s->reg.int_cstat |= L_INT_CSTAT_INTCNT; |
| 901 |
|
| 902 |
/* raise interrupt if enabled */
|
| 903 |
if (s->reg.int_enb & L_INT_INTENB_ICNTEIE) {
|
| 904 |
#ifdef DEBUG_MCT
|
| 905 |
time2[s->id] = qemu_get_clock_ns(vm_clock); |
| 906 |
DPRINTF("local timer[%d] IRQ: %llx\n", s->id,
|
| 907 |
time2[s->id] - time1[s->id]); |
| 908 |
time1[s->id] = time2[s->id]; |
| 909 |
#endif
|
| 910 |
qemu_irq_raise(s->irq); |
| 911 |
} |
| 912 |
|
| 913 |
/* reload ICNTB */
|
| 914 |
if (s->reg.tcon & L_TCON_INTERVAL_MODE) {
|
| 915 |
exynos4210_ltick_set_cntb(&s->tick_timer, |
| 916 |
s->reg.cnt[L_REG_CNT_TCNTB], |
| 917 |
s->reg.cnt[L_REG_CNT_ICNTB]); |
| 918 |
} |
| 919 |
} else {
|
| 920 |
/* reload TCNTB */
|
| 921 |
if (!tcnto) {
|
| 922 |
exynos4210_ltick_set_cntb(&s->tick_timer, |
| 923 |
s->reg.cnt[L_REG_CNT_TCNTB], |
| 924 |
icnto); |
| 925 |
} |
| 926 |
} |
| 927 |
|
| 928 |
/* start tick_timer cnt */
|
| 929 |
exynos4210_ltick_cnt_start(&s->tick_timer); |
| 930 |
|
| 931 |
/* start tick_timer int */
|
| 932 |
exynos4210_ltick_int_start(&s->tick_timer); |
| 933 |
} |
| 934 |
|
| 935 |
/* update timer frequency */
|
| 936 |
static void exynos4210_mct_update_freq(Exynos4210MCTState *s) |
| 937 |
{
|
| 938 |
uint32_t freq = s->freq; |
| 939 |
s->freq = 24000000 /
|
| 940 |
((MCT_CFG_GET_PRESCALER(s->reg_mct_cfg)+1) *
|
| 941 |
MCT_CFG_GET_DIVIDER(s->reg_mct_cfg)); |
| 942 |
|
| 943 |
if (freq != s->freq) {
|
| 944 |
DPRINTF("freq=%dHz\n", s->freq);
|
| 945 |
|
| 946 |
/* global timer */
|
| 947 |
ptimer_set_freq(s->g_timer.ptimer_frc, s->freq); |
| 948 |
|
| 949 |
/* local timer */
|
| 950 |
ptimer_set_freq(s->l_timer[0].tick_timer.ptimer_tick, s->freq);
|
| 951 |
ptimer_set_freq(s->l_timer[0].ptimer_frc, s->freq);
|
| 952 |
ptimer_set_freq(s->l_timer[1].tick_timer.ptimer_tick, s->freq);
|
| 953 |
ptimer_set_freq(s->l_timer[1].ptimer_frc, s->freq);
|
| 954 |
} |
| 955 |
} |
| 956 |
|
| 957 |
/* set defaul_timer values for all fields */
|
| 958 |
static void exynos4210_mct_reset(DeviceState *d) |
| 959 |
{
|
| 960 |
Exynos4210MCTState *s = (Exynos4210MCTState *)d; |
| 961 |
uint32_t i; |
| 962 |
|
| 963 |
s->reg_mct_cfg = 0;
|
| 964 |
|
| 965 |
/* global timer */
|
| 966 |
memset(&s->g_timer.reg, 0, sizeof(s->g_timer.reg)); |
| 967 |
exynos4210_gfrc_stop(&s->g_timer); |
| 968 |
|
| 969 |
/* local timer */
|
| 970 |
memset(s->l_timer[0].reg.cnt, 0, sizeof(s->l_timer[0].reg.cnt)); |
| 971 |
memset(s->l_timer[1].reg.cnt, 0, sizeof(s->l_timer[1].reg.cnt)); |
| 972 |
for (i = 0; i < 2; i++) { |
| 973 |
s->l_timer[i].reg.int_cstat = 0;
|
| 974 |
s->l_timer[i].reg.int_enb = 0;
|
| 975 |
s->l_timer[i].reg.tcon = 0;
|
| 976 |
s->l_timer[i].reg.wstat = 0;
|
| 977 |
s->l_timer[i].tick_timer.count = 0;
|
| 978 |
s->l_timer[i].tick_timer.distance = 0;
|
| 979 |
s->l_timer[i].tick_timer.progress = 0;
|
| 980 |
ptimer_stop(s->l_timer[i].ptimer_frc); |
| 981 |
|
| 982 |
exynos4210_ltick_timer_init(&s->l_timer[i].tick_timer); |
| 983 |
} |
| 984 |
|
| 985 |
exynos4210_mct_update_freq(s); |
| 986 |
|
| 987 |
} |
| 988 |
|
| 989 |
/* Multi Core Timer read */
|
| 990 |
static uint64_t exynos4210_mct_read(void *opaque, target_phys_addr_t offset, |
| 991 |
unsigned size)
|
| 992 |
{
|
| 993 |
Exynos4210MCTState *s = (Exynos4210MCTState *)opaque; |
| 994 |
int index;
|
| 995 |
int shift;
|
| 996 |
uint64_t count; |
| 997 |
uint32_t value; |
| 998 |
int lt_i;
|
| 999 |
|
| 1000 |
switch (offset) {
|
| 1001 |
|
| 1002 |
case MCT_CFG:
|
| 1003 |
value = s->reg_mct_cfg; |
| 1004 |
break;
|
| 1005 |
|
| 1006 |
case G_CNT_L: case G_CNT_U: |
| 1007 |
shift = 8 * (offset & 0x4); |
| 1008 |
count = exynos4210_gfrc_get_count(&s->g_timer); |
| 1009 |
value = UINT32_MAX & (count >> shift); |
| 1010 |
DPRINTF("read FRC=0x%llx\n", count);
|
| 1011 |
break;
|
| 1012 |
|
| 1013 |
case G_CNT_WSTAT:
|
| 1014 |
value = s->g_timer.reg.cnt_wstat; |
| 1015 |
break;
|
| 1016 |
|
| 1017 |
case G_COMP_L(0): case G_COMP_L(1): case G_COMP_L(2): case G_COMP_L(3): |
| 1018 |
case G_COMP_U(0): case G_COMP_U(1): case G_COMP_U(2): case G_COMP_U(3): |
| 1019 |
index = GET_G_COMP_IDX(offset); |
| 1020 |
shift = 8 * (offset & 0x4); |
| 1021 |
value = UINT32_MAX & (s->g_timer.reg.comp[index] >> shift); |
| 1022 |
break;
|
| 1023 |
|
| 1024 |
case G_TCON:
|
| 1025 |
value = s->g_timer.reg.tcon; |
| 1026 |
break;
|
| 1027 |
|
| 1028 |
case G_INT_CSTAT:
|
| 1029 |
value = s->g_timer.reg.int_cstat; |
| 1030 |
break;
|
| 1031 |
|
| 1032 |
case G_INT_ENB:
|
| 1033 |
value = s->g_timer.reg.int_enb; |
| 1034 |
break;
|
| 1035 |
break;
|
| 1036 |
case G_WSTAT:
|
| 1037 |
value = s->g_timer.reg.wstat; |
| 1038 |
break;
|
| 1039 |
|
| 1040 |
case G_COMP0_ADD_INCR: case G_COMP1_ADD_INCR: |
| 1041 |
case G_COMP2_ADD_INCR: case G_COMP3_ADD_INCR: |
| 1042 |
value = s->g_timer.reg.comp_add_incr[GET_G_COMP_ADD_INCR_IDX(offset)]; |
| 1043 |
break;
|
| 1044 |
|
| 1045 |
/* Local timers */
|
| 1046 |
case L0_TCNTB: case L0_ICNTB: case L0_FRCNTB: |
| 1047 |
case L1_TCNTB: case L1_ICNTB: case L1_FRCNTB: |
| 1048 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1049 |
index = GET_L_TIMER_CNT_REG_IDX(offset, lt_i); |
| 1050 |
value = s->l_timer[lt_i].reg.cnt[index]; |
| 1051 |
break;
|
| 1052 |
|
| 1053 |
case L0_TCNTO: case L1_TCNTO: |
| 1054 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1055 |
|
| 1056 |
value = exynos4210_ltick_cnt_get_cnto(&s->l_timer[lt_i].tick_timer); |
| 1057 |
DPRINTF("local timer[%d] read TCNTO %x\n", lt_i, value);
|
| 1058 |
break;
|
| 1059 |
|
| 1060 |
case L0_ICNTO: case L1_ICNTO: |
| 1061 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1062 |
|
| 1063 |
value = exynos4210_ltick_int_get_cnto(&s->l_timer[lt_i].tick_timer); |
| 1064 |
DPRINTF("local timer[%d] read ICNTO %x\n", lt_i, value);
|
| 1065 |
break;
|
| 1066 |
|
| 1067 |
case L0_FRCNTO: case L1_FRCNTO: |
| 1068 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1069 |
|
| 1070 |
value = exynos4210_lfrc_get_count(&s->l_timer[lt_i]); |
| 1071 |
|
| 1072 |
break;
|
| 1073 |
|
| 1074 |
case L0_TCON: case L1_TCON: |
| 1075 |
lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; |
| 1076 |
value = s->l_timer[lt_i].reg.tcon; |
| 1077 |
break;
|
| 1078 |
|
| 1079 |
case L0_INT_CSTAT: case L1_INT_CSTAT: |
| 1080 |
lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; |
| 1081 |
value = s->l_timer[lt_i].reg.int_cstat; |
| 1082 |
break;
|
| 1083 |
|
| 1084 |
case L0_INT_ENB: case L1_INT_ENB: |
| 1085 |
lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; |
| 1086 |
value = s->l_timer[lt_i].reg.int_enb; |
| 1087 |
break;
|
| 1088 |
|
| 1089 |
case L0_WSTAT: case L1_WSTAT: |
| 1090 |
lt_i = ((offset & 0xF00) - L0_TCNTB) / 0x100; |
| 1091 |
value = s->l_timer[lt_i].reg.wstat; |
| 1092 |
break;
|
| 1093 |
|
| 1094 |
default:
|
| 1095 |
hw_error("exynos4210.mct: bad read offset "
|
| 1096 |
TARGET_FMT_plx "\n", offset);
|
| 1097 |
break;
|
| 1098 |
} |
| 1099 |
return value;
|
| 1100 |
} |
| 1101 |
|
| 1102 |
/* MCT write */
|
| 1103 |
static void exynos4210_mct_write(void *opaque, target_phys_addr_t offset, |
| 1104 |
uint64_t value, unsigned size)
|
| 1105 |
{
|
| 1106 |
Exynos4210MCTState *s = (Exynos4210MCTState *)opaque; |
| 1107 |
int index; /* index in buffer which represents register set */ |
| 1108 |
int shift;
|
| 1109 |
int lt_i;
|
| 1110 |
uint64_t new_frc; |
| 1111 |
uint32_t i; |
| 1112 |
uint32_t old_val; |
| 1113 |
#ifdef DEBUG_MCT
|
| 1114 |
static uint32_t icntb_max[2] = {0}; |
| 1115 |
static uint32_t icntb_min[2] = {UINT32_MAX, UINT32_MAX}; |
| 1116 |
static uint32_t tcntb_max[2] = {0}; |
| 1117 |
static uint32_t tcntb_min[2] = {UINT32_MAX, UINT32_MAX}; |
| 1118 |
#endif
|
| 1119 |
|
| 1120 |
new_frc = s->g_timer.reg.cnt; |
| 1121 |
|
| 1122 |
switch (offset) {
|
| 1123 |
|
| 1124 |
case MCT_CFG:
|
| 1125 |
s->reg_mct_cfg = value; |
| 1126 |
exynos4210_mct_update_freq(s); |
| 1127 |
break;
|
| 1128 |
|
| 1129 |
case G_CNT_L:
|
| 1130 |
case G_CNT_U:
|
| 1131 |
if (offset == G_CNT_L) {
|
| 1132 |
|
| 1133 |
DPRINTF("global timer write to reg.cntl %llx\n", value);
|
| 1134 |
|
| 1135 |
new_frc = (s->g_timer.reg.cnt & (uint64_t)UINT32_MAX << 32) + value;
|
| 1136 |
s->g_timer.reg.cnt_wstat |= G_CNT_WSTAT_L; |
| 1137 |
} |
| 1138 |
if (offset == G_CNT_U) {
|
| 1139 |
|
| 1140 |
DPRINTF("global timer write to reg.cntu %llx\n", value);
|
| 1141 |
|
| 1142 |
new_frc = (s->g_timer.reg.cnt & UINT32_MAX) + |
| 1143 |
((uint64_t)value << 32);
|
| 1144 |
s->g_timer.reg.cnt_wstat |= G_CNT_WSTAT_U; |
| 1145 |
} |
| 1146 |
|
| 1147 |
s->g_timer.reg.cnt = new_frc; |
| 1148 |
exynos4210_gfrc_restart(s); |
| 1149 |
break;
|
| 1150 |
|
| 1151 |
case G_CNT_WSTAT:
|
| 1152 |
s->g_timer.reg.cnt_wstat &= ~(value); |
| 1153 |
break;
|
| 1154 |
|
| 1155 |
case G_COMP_L(0): case G_COMP_L(1): case G_COMP_L(2): case G_COMP_L(3): |
| 1156 |
case G_COMP_U(0): case G_COMP_U(1): case G_COMP_U(2): case G_COMP_U(3): |
| 1157 |
index = GET_G_COMP_IDX(offset); |
| 1158 |
shift = 8 * (offset & 0x4); |
| 1159 |
s->g_timer.reg.comp[index] = |
| 1160 |
(s->g_timer.reg.comp[index] & |
| 1161 |
(((uint64_t)UINT32_MAX << 32) >> shift)) +
|
| 1162 |
(value << shift); |
| 1163 |
|
| 1164 |
DPRINTF("comparator %d write 0x%llx val << %d\n", index, value, shift);
|
| 1165 |
|
| 1166 |
if (offset&0x4) { |
| 1167 |
s->g_timer.reg.wstat |= G_WSTAT_COMP_U(index); |
| 1168 |
} else {
|
| 1169 |
s->g_timer.reg.wstat |= G_WSTAT_COMP_L(index); |
| 1170 |
} |
| 1171 |
|
| 1172 |
exynos4210_gfrc_restart(s); |
| 1173 |
break;
|
| 1174 |
|
| 1175 |
case G_TCON:
|
| 1176 |
old_val = s->g_timer.reg.tcon; |
| 1177 |
s->g_timer.reg.tcon = value; |
| 1178 |
s->g_timer.reg.wstat |= G_WSTAT_TCON_WRITE; |
| 1179 |
|
| 1180 |
DPRINTF("global timer write to reg.g_tcon %llx\n", value);
|
| 1181 |
|
| 1182 |
/* Start FRC if transition from disabled to enabled */
|
| 1183 |
if ((value & G_TCON_TIMER_ENABLE) > (old_val &
|
| 1184 |
G_TCON_TIMER_ENABLE)) {
|
| 1185 |
exynos4210_gfrc_start(&s->g_timer); |
| 1186 |
} |
| 1187 |
if ((value & G_TCON_TIMER_ENABLE) < (old_val &
|
| 1188 |
G_TCON_TIMER_ENABLE)) {
|
| 1189 |
exynos4210_gfrc_stop(&s->g_timer); |
| 1190 |
} |
| 1191 |
|
| 1192 |
/* Start CMP if transition from disabled to enabled */
|
| 1193 |
for (i = 0; i < MCT_GT_CMP_NUM; i++) { |
| 1194 |
if ((value & G_TCON_COMP_ENABLE(i)) != (old_val &
|
| 1195 |
G_TCON_COMP_ENABLE(i))) {
|
| 1196 |
exynos4210_gfrc_restart(s); |
| 1197 |
} |
| 1198 |
} |
| 1199 |
break;
|
| 1200 |
|
| 1201 |
case G_INT_CSTAT:
|
| 1202 |
s->g_timer.reg.int_cstat &= ~(value); |
| 1203 |
for (i = 0; i < MCT_GT_CMP_NUM; i++) { |
| 1204 |
if (value & G_INT_CSTAT_COMP(i)) {
|
| 1205 |
exynos4210_gcomp_lower_irq(&s->g_timer, i); |
| 1206 |
} |
| 1207 |
} |
| 1208 |
break;
|
| 1209 |
|
| 1210 |
case G_INT_ENB:
|
| 1211 |
|
| 1212 |
/* Raise IRQ if transition from disabled to enabled and CSTAT pending */
|
| 1213 |
for (i = 0; i < MCT_GT_CMP_NUM; i++) { |
| 1214 |
if ((value & G_INT_ENABLE(i)) > (s->g_timer.reg.tcon &
|
| 1215 |
G_INT_ENABLE(i))) {
|
| 1216 |
if (s->g_timer.reg.int_cstat & G_INT_CSTAT_COMP(i)) {
|
| 1217 |
exynos4210_gcomp_raise_irq(&s->g_timer, i); |
| 1218 |
} |
| 1219 |
} |
| 1220 |
|
| 1221 |
if ((value & G_INT_ENABLE(i)) < (s->g_timer.reg.tcon &
|
| 1222 |
G_INT_ENABLE(i))) {
|
| 1223 |
exynos4210_gcomp_lower_irq(&s->g_timer, i); |
| 1224 |
} |
| 1225 |
} |
| 1226 |
|
| 1227 |
DPRINTF("global timer INT enable %llx\n", value);
|
| 1228 |
s->g_timer.reg.int_enb = value; |
| 1229 |
break;
|
| 1230 |
|
| 1231 |
case G_WSTAT:
|
| 1232 |
s->g_timer.reg.wstat &= ~(value); |
| 1233 |
break;
|
| 1234 |
|
| 1235 |
case G_COMP0_ADD_INCR: case G_COMP1_ADD_INCR: |
| 1236 |
case G_COMP2_ADD_INCR: case G_COMP3_ADD_INCR: |
| 1237 |
index = GET_G_COMP_ADD_INCR_IDX(offset); |
| 1238 |
s->g_timer.reg.comp_add_incr[index] = value; |
| 1239 |
s->g_timer.reg.wstat |= G_WSTAT_COMP_ADDINCR(index); |
| 1240 |
break;
|
| 1241 |
|
| 1242 |
/* Local timers */
|
| 1243 |
case L0_TCON: case L1_TCON: |
| 1244 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1245 |
old_val = s->l_timer[lt_i].reg.tcon; |
| 1246 |
|
| 1247 |
s->l_timer[lt_i].reg.wstat |= L_WSTAT_TCON_WRITE; |
| 1248 |
s->l_timer[lt_i].reg.tcon = value; |
| 1249 |
|
| 1250 |
/* Stop local CNT */
|
| 1251 |
if ((value & L_TCON_TICK_START) <
|
| 1252 |
(old_val & L_TCON_TICK_START)) {
|
| 1253 |
DPRINTF("local timer[%d] stop cnt\n", lt_i);
|
| 1254 |
exynos4210_ltick_cnt_stop(&s->l_timer[lt_i].tick_timer); |
| 1255 |
} |
| 1256 |
|
| 1257 |
/* Stop local INT */
|
| 1258 |
if ((value & L_TCON_INT_START) <
|
| 1259 |
(old_val & L_TCON_INT_START)) {
|
| 1260 |
DPRINTF("local timer[%d] stop int\n", lt_i);
|
| 1261 |
exynos4210_ltick_int_stop(&s->l_timer[lt_i].tick_timer); |
| 1262 |
} |
| 1263 |
|
| 1264 |
/* Start local CNT */
|
| 1265 |
if ((value & L_TCON_TICK_START) >
|
| 1266 |
(old_val & L_TCON_TICK_START)) {
|
| 1267 |
DPRINTF("local timer[%d] start cnt\n", lt_i);
|
| 1268 |
exynos4210_ltick_cnt_start(&s->l_timer[lt_i].tick_timer); |
| 1269 |
} |
| 1270 |
|
| 1271 |
/* Start local INT */
|
| 1272 |
if ((value & L_TCON_INT_START) >
|
| 1273 |
(old_val & L_TCON_INT_START)) {
|
| 1274 |
DPRINTF("local timer[%d] start int\n", lt_i);
|
| 1275 |
exynos4210_ltick_int_start(&s->l_timer[lt_i].tick_timer); |
| 1276 |
} |
| 1277 |
|
| 1278 |
/* Start or Stop local FRC if TCON changed */
|
| 1279 |
if ((value & L_TCON_FRC_START) >
|
| 1280 |
(s->l_timer[lt_i].reg.tcon & L_TCON_FRC_START)) {
|
| 1281 |
DPRINTF("local timer[%d] start frc\n", lt_i);
|
| 1282 |
exynos4210_lfrc_start(&s->l_timer[lt_i]); |
| 1283 |
} |
| 1284 |
if ((value & L_TCON_FRC_START) <
|
| 1285 |
(s->l_timer[lt_i].reg.tcon & L_TCON_FRC_START)) {
|
| 1286 |
DPRINTF("local timer[%d] stop frc\n", lt_i);
|
| 1287 |
exynos4210_lfrc_stop(&s->l_timer[lt_i]); |
| 1288 |
} |
| 1289 |
break;
|
| 1290 |
|
| 1291 |
case L0_TCNTB: case L1_TCNTB: |
| 1292 |
|
| 1293 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1294 |
index = GET_L_TIMER_CNT_REG_IDX(offset, lt_i); |
| 1295 |
|
| 1296 |
/*
|
| 1297 |
* TCNTB is updated to internal register only after CNT expired.
|
| 1298 |
* Due to this we should reload timer to nearest moment when CNT is
|
| 1299 |
* expired and then in event handler update tcntb to new TCNTB value.
|
| 1300 |
*/
|
| 1301 |
exynos4210_ltick_set_cntb(&s->l_timer[lt_i].tick_timer, value, |
| 1302 |
s->l_timer[lt_i].tick_timer.icntb); |
| 1303 |
|
| 1304 |
s->l_timer[lt_i].reg.wstat |= L_WSTAT_TCNTB_WRITE; |
| 1305 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB] = value; |
| 1306 |
|
| 1307 |
#ifdef DEBUG_MCT
|
| 1308 |
if (tcntb_min[lt_i] > value) {
|
| 1309 |
tcntb_min[lt_i] = value; |
| 1310 |
} |
| 1311 |
if (tcntb_max[lt_i] < value) {
|
| 1312 |
tcntb_max[lt_i] = value; |
| 1313 |
} |
| 1314 |
DPRINTF("local timer[%d] TCNTB write %llx; max=%x, min=%x\n",
|
| 1315 |
lt_i, value, tcntb_max[lt_i], tcntb_min[lt_i]); |
| 1316 |
#endif
|
| 1317 |
break;
|
| 1318 |
|
| 1319 |
case L0_ICNTB: case L1_ICNTB: |
| 1320 |
|
| 1321 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1322 |
index = GET_L_TIMER_CNT_REG_IDX(offset, lt_i); |
| 1323 |
|
| 1324 |
s->l_timer[lt_i].reg.wstat |= L_WSTAT_ICNTB_WRITE; |
| 1325 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] = value & |
| 1326 |
~L_ICNTB_MANUAL_UPDATE; |
| 1327 |
|
| 1328 |
/*
|
| 1329 |
* We need to avoid too small values for TCNTB*ICNTB. If not, IRQ event
|
| 1330 |
* could raise too fast disallowing QEMU to execute target code.
|
| 1331 |
*/
|
| 1332 |
if (s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] *
|
| 1333 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB] < MCT_LT_CNT_LOW_LIMIT) {
|
| 1334 |
if (!s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB]) {
|
| 1335 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] = |
| 1336 |
MCT_LT_CNT_LOW_LIMIT; |
| 1337 |
} else {
|
| 1338 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB] = |
| 1339 |
MCT_LT_CNT_LOW_LIMIT / |
| 1340 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_TCNTB]; |
| 1341 |
} |
| 1342 |
} |
| 1343 |
|
| 1344 |
if (value & L_ICNTB_MANUAL_UPDATE) {
|
| 1345 |
exynos4210_ltick_set_cntb(&s->l_timer[lt_i].tick_timer, |
| 1346 |
s->l_timer[lt_i].tick_timer.tcntb, |
| 1347 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_ICNTB]); |
| 1348 |
} |
| 1349 |
|
| 1350 |
#ifdef DEBUG_MCT
|
| 1351 |
if (icntb_min[lt_i] > value) {
|
| 1352 |
icntb_min[lt_i] = value; |
| 1353 |
} |
| 1354 |
if (icntb_max[lt_i] < value) {
|
| 1355 |
icntb_max[lt_i] = value; |
| 1356 |
} |
| 1357 |
DPRINTF("local timer[%d] ICNTB write %llx; max=%x, min=%x\n\n",
|
| 1358 |
lt_i, value, icntb_max[lt_i], icntb_min[lt_i]); |
| 1359 |
#endif
|
| 1360 |
break;
|
| 1361 |
|
| 1362 |
case L0_FRCNTB: case L1_FRCNTB: |
| 1363 |
|
| 1364 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1365 |
index = GET_L_TIMER_CNT_REG_IDX(offset, lt_i); |
| 1366 |
|
| 1367 |
DPRINTF("local timer[%d] FRCNTB write %llx\n", lt_i, value);
|
| 1368 |
|
| 1369 |
s->l_timer[lt_i].reg.wstat |= L_WSTAT_FRCCNTB_WRITE; |
| 1370 |
s->l_timer[lt_i].reg.cnt[L_REG_CNT_FRCCNTB] = value; |
| 1371 |
|
| 1372 |
break;
|
| 1373 |
|
| 1374 |
case L0_TCNTO: case L1_TCNTO: |
| 1375 |
case L0_ICNTO: case L1_ICNTO: |
| 1376 |
case L0_FRCNTO: case L1_FRCNTO: |
| 1377 |
fprintf(stderr, "\n[exynos4210.mct: write to RO register "
|
| 1378 |
TARGET_FMT_plx "]\n\n", offset);
|
| 1379 |
break;
|
| 1380 |
|
| 1381 |
case L0_INT_CSTAT: case L1_INT_CSTAT: |
| 1382 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1383 |
|
| 1384 |
DPRINTF("local timer[%d] CSTAT write %llx\n", lt_i, value);
|
| 1385 |
|
| 1386 |
s->l_timer[lt_i].reg.int_cstat &= ~value; |
| 1387 |
if (!s->l_timer[lt_i].reg.int_cstat) {
|
| 1388 |
qemu_irq_lower(s->l_timer[lt_i].irq); |
| 1389 |
} |
| 1390 |
break;
|
| 1391 |
|
| 1392 |
case L0_INT_ENB: case L1_INT_ENB: |
| 1393 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1394 |
old_val = s->l_timer[lt_i].reg.int_enb; |
| 1395 |
|
| 1396 |
/* Raise Local timer IRQ if cstat is pending */
|
| 1397 |
if ((value & L_INT_INTENB_ICNTEIE) > (old_val & L_INT_INTENB_ICNTEIE)) {
|
| 1398 |
if (s->l_timer[lt_i].reg.int_cstat & L_INT_CSTAT_INTCNT) {
|
| 1399 |
qemu_irq_raise(s->l_timer[lt_i].irq); |
| 1400 |
} |
| 1401 |
} |
| 1402 |
|
| 1403 |
s->l_timer[lt_i].reg.int_enb = value; |
| 1404 |
|
| 1405 |
break;
|
| 1406 |
|
| 1407 |
case L0_WSTAT: case L1_WSTAT: |
| 1408 |
lt_i = GET_L_TIMER_IDX(offset); |
| 1409 |
|
| 1410 |
s->l_timer[lt_i].reg.wstat &= ~value; |
| 1411 |
break;
|
| 1412 |
|
| 1413 |
default:
|
| 1414 |
hw_error("exynos4210.mct: bad write offset "
|
| 1415 |
TARGET_FMT_plx "\n", offset);
|
| 1416 |
break;
|
| 1417 |
} |
| 1418 |
} |
| 1419 |
|
| 1420 |
static const MemoryRegionOps exynos4210_mct_ops = { |
| 1421 |
.read = exynos4210_mct_read, |
| 1422 |
.write = exynos4210_mct_write, |
| 1423 |
.endianness = DEVICE_NATIVE_ENDIAN, |
| 1424 |
}; |
| 1425 |
|
| 1426 |
/* MCT init */
|
| 1427 |
static int exynos4210_mct_init(SysBusDevice *dev) |
| 1428 |
{
|
| 1429 |
int i;
|
| 1430 |
Exynos4210MCTState *s = FROM_SYSBUS(Exynos4210MCTState, dev); |
| 1431 |
QEMUBH *bh[2];
|
| 1432 |
|
| 1433 |
/* Global timer */
|
| 1434 |
bh[0] = qemu_bh_new(exynos4210_gfrc_event, s);
|
| 1435 |
s->g_timer.ptimer_frc = ptimer_init(bh[0]);
|
| 1436 |
memset(&s->g_timer.reg, 0, sizeof(struct gregs)); |
| 1437 |
|
| 1438 |
/* Local timers */
|
| 1439 |
for (i = 0; i < 2; i++) { |
| 1440 |
bh[0] = qemu_bh_new(exynos4210_ltick_event, &s->l_timer[i]);
|
| 1441 |
bh[1] = qemu_bh_new(exynos4210_lfrc_event, &s->l_timer[i]);
|
| 1442 |
s->l_timer[i].tick_timer.ptimer_tick = ptimer_init(bh[0]);
|
| 1443 |
s->l_timer[i].ptimer_frc = ptimer_init(bh[1]);
|
| 1444 |
s->l_timer[i].id = i; |
| 1445 |
} |
| 1446 |
|
| 1447 |
/* IRQs */
|
| 1448 |
for (i = 0; i < MCT_GT_CMP_NUM; i++) { |
| 1449 |
sysbus_init_irq(dev, &s->g_timer.irq[i]); |
| 1450 |
} |
| 1451 |
for (i = 0; i < 2; i++) { |
| 1452 |
sysbus_init_irq(dev, &s->l_timer[i].irq); |
| 1453 |
} |
| 1454 |
|
| 1455 |
memory_region_init_io(&s->iomem, &exynos4210_mct_ops, s, "exynos4210-mct",
|
| 1456 |
MCT_SFR_SIZE); |
| 1457 |
sysbus_init_mmio(dev, &s->iomem); |
| 1458 |
|
| 1459 |
return 0; |
| 1460 |
} |
| 1461 |
|
| 1462 |
static void exynos4210_mct_class_init(ObjectClass *klass, void *data) |
| 1463 |
{
|
| 1464 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 1465 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| 1466 |
|
| 1467 |
k->init = exynos4210_mct_init; |
| 1468 |
dc->reset = exynos4210_mct_reset; |
| 1469 |
dc->vmsd = &vmstate_exynos4210_mct_state; |
| 1470 |
} |
| 1471 |
|
| 1472 |
static TypeInfo exynos4210_mct_info = {
|
| 1473 |
.name = "exynos4210.mct",
|
| 1474 |
.parent = TYPE_SYS_BUS_DEVICE, |
| 1475 |
.instance_size = sizeof(Exynos4210MCTState),
|
| 1476 |
.class_init = exynos4210_mct_class_init, |
| 1477 |
}; |
| 1478 |
|
| 1479 |
static void exynos4210_mct_register_types(void) |
| 1480 |
{
|
| 1481 |
type_register_static(&exynos4210_mct_info); |
| 1482 |
} |
| 1483 |
|
| 1484 |
type_init(exynos4210_mct_register_types) |