root / target-sh4 / helper.c @ a8170e5e
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/*
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* SH4 emulation
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*
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* Copyright (c) 2005 Samuel Tardieu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include <signal.h> |
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#include "cpu.h" |
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#if !defined(CONFIG_USER_ONLY)
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#include "hw/sh_intc.h" |
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#endif
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#if defined(CONFIG_USER_ONLY)
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void do_interrupt (CPUSH4State *env)
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{ |
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env->exception_index = -1;
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} |
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int cpu_sh4_handle_mmu_fault(CPUSH4State * env, target_ulong address, int rw, |
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int mmu_idx)
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{ |
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env->tea = address; |
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env->exception_index = -1;
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switch (rw) {
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case 0: |
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env->exception_index = 0x0a0;
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break;
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case 1: |
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env->exception_index = 0x0c0;
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break;
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case 2: |
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env->exception_index = 0x0a0;
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break;
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} |
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return 1; |
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} |
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int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
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{ |
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/* For user mode, only U0 area is cachable. */
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return !(addr & 0x80000000); |
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} |
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#else /* !CONFIG_USER_ONLY */ |
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#define MMU_OK 0 |
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#define MMU_ITLB_MISS (-1) |
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#define MMU_ITLB_MULTIPLE (-2) |
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#define MMU_ITLB_VIOLATION (-3) |
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#define MMU_DTLB_MISS_READ (-4) |
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#define MMU_DTLB_MISS_WRITE (-5) |
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#define MMU_DTLB_INITIAL_WRITE (-6) |
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#define MMU_DTLB_VIOLATION_READ (-7) |
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#define MMU_DTLB_VIOLATION_WRITE (-8) |
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#define MMU_DTLB_MULTIPLE (-9) |
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#define MMU_DTLB_MISS (-10) |
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#define MMU_IADDR_ERROR (-11) |
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#define MMU_DADDR_ERROR_READ (-12) |
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#define MMU_DADDR_ERROR_WRITE (-13) |
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void do_interrupt(CPUSH4State * env)
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{ |
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int do_irq = env->interrupt_request & CPU_INTERRUPT_HARD;
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int do_exp, irq_vector = env->exception_index;
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/* prioritize exceptions over interrupts */
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do_exp = env->exception_index != -1;
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do_irq = do_irq && (env->exception_index == -1);
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if (env->sr & SR_BL) {
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if (do_exp && env->exception_index != 0x1e0) { |
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env->exception_index = 0x000; /* masked exception -> reset */ |
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} |
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if (do_irq && !env->in_sleep) {
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return; /* masked */ |
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} |
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} |
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env->in_sleep = 0;
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if (do_irq) {
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irq_vector = sh_intc_get_pending_vector(env->intc_handle, |
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(env->sr >> 4) & 0xf); |
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if (irq_vector == -1) { |
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return; /* masked */ |
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} |
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} |
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if (qemu_loglevel_mask(CPU_LOG_INT)) {
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const char *expname; |
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switch (env->exception_index) {
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case 0x0e0: |
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expname = "addr_error";
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break;
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case 0x040: |
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expname = "tlb_miss";
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break;
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case 0x0a0: |
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expname = "tlb_violation";
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break;
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case 0x180: |
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expname = "illegal_instruction";
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break;
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case 0x1a0: |
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expname = "slot_illegal_instruction";
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break;
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case 0x800: |
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expname = "fpu_disable";
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break;
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case 0x820: |
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expname = "slot_fpu";
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break;
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case 0x100: |
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expname = "data_write";
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break;
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case 0x060: |
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expname = "dtlb_miss_write";
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break;
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case 0x0c0: |
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expname = "dtlb_violation_write";
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break;
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case 0x120: |
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expname = "fpu_exception";
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break;
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case 0x080: |
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expname = "initial_page_write";
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break;
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case 0x160: |
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expname = "trapa";
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break;
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default:
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expname = do_irq ? "interrupt" : "???"; |
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break;
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} |
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qemu_log("exception 0x%03x [%s] raised\n",
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irq_vector, expname); |
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log_cpu_state(env, 0);
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} |
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env->ssr = env->sr; |
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env->spc = env->pc; |
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env->sgr = env->gregs[15];
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env->sr |= SR_BL | SR_MD | SR_RB; |
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if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
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/* Branch instruction should be executed again before delay slot. */
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env->spc -= 2;
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/* Clear flags for exception/interrupt routine. */
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env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE); |
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} |
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if (env->flags & DELAY_SLOT_CLEARME)
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env->flags = 0;
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if (do_exp) {
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env->expevt = env->exception_index; |
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switch (env->exception_index) {
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case 0x000: |
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case 0x020: |
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case 0x140: |
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env->sr &= ~SR_FD; |
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env->sr |= 0xf << 4; /* IMASK */ |
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env->pc = 0xa0000000;
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break;
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case 0x040: |
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case 0x060: |
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env->pc = env->vbr + 0x400;
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break;
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case 0x160: |
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env->spc += 2; /* special case for TRAPA */ |
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/* fall through */
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default:
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env->pc = env->vbr + 0x100;
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break;
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} |
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return;
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} |
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if (do_irq) {
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env->intevt = irq_vector; |
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env->pc = env->vbr + 0x600;
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return;
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} |
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} |
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static void update_itlb_use(CPUSH4State * env, int itlbnb) |
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{ |
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uint8_t or_mask = 0, and_mask = (uint8_t) - 1; |
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switch (itlbnb) {
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case 0: |
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and_mask = 0x1f;
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break;
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case 1: |
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and_mask = 0xe7;
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or_mask = 0x80;
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break;
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case 2: |
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and_mask = 0xfb;
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or_mask = 0x50;
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break;
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case 3: |
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or_mask = 0x2c;
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break;
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} |
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env->mmucr &= (and_mask << 24) | 0x00ffffff; |
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env->mmucr |= (or_mask << 24);
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} |
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static int itlb_replacement(CPUSH4State * env) |
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{ |
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if ((env->mmucr & 0xe0000000) == 0xe0000000) |
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return 0; |
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if ((env->mmucr & 0x98000000) == 0x18000000) |
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return 1; |
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if ((env->mmucr & 0x54000000) == 0x04000000) |
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return 2; |
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if ((env->mmucr & 0x2c000000) == 0x00000000) |
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return 3; |
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cpu_abort(env, "Unhandled itlb_replacement");
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} |
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/* Find the corresponding entry in the right TLB
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Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
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*/
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static int find_tlb_entry(CPUSH4State * env, target_ulong address, |
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tlb_t * entries, uint8_t nbtlb, int use_asid)
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{ |
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int match = MMU_DTLB_MISS;
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uint32_t start, end; |
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uint8_t asid; |
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int i;
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asid = env->pteh & 0xff;
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for (i = 0; i < nbtlb; i++) { |
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if (!entries[i].v)
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continue; /* Invalid entry */ |
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if (!entries[i].sh && use_asid && entries[i].asid != asid)
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continue; /* Bad ASID */ |
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start = (entries[i].vpn << 10) & ~(entries[i].size - 1); |
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end = start + entries[i].size - 1;
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if (address >= start && address <= end) { /* Match */ |
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if (match != MMU_DTLB_MISS)
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return MMU_DTLB_MULTIPLE; /* Multiple match */ |
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match = i; |
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} |
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} |
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return match;
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} |
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static void increment_urc(CPUSH4State * env) |
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{ |
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uint8_t urb, urc; |
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/* Increment URC */
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urb = ((env->mmucr) >> 18) & 0x3f; |
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urc = ((env->mmucr) >> 10) & 0x3f; |
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urc++; |
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if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1)) |
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urc = 0;
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env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10); |
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} |
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/* Copy and utlb entry into itlb
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Return entry
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*/
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static int copy_utlb_entry_itlb(CPUSH4State *env, int utlb) |
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{ |
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int itlb;
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tlb_t * ientry; |
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itlb = itlb_replacement(env); |
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ientry = &env->itlb[itlb]; |
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if (ientry->v) {
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tlb_flush_page(env, ientry->vpn << 10);
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} |
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*ientry = env->utlb[utlb]; |
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update_itlb_use(env, itlb); |
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return itlb;
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} |
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/* Find itlb entry
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Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
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*/
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static int find_itlb_entry(CPUSH4State * env, target_ulong address, |
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int use_asid)
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{ |
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int e;
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e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid); |
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if (e == MMU_DTLB_MULTIPLE) {
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e = MMU_ITLB_MULTIPLE; |
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} else if (e == MMU_DTLB_MISS) { |
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e = MMU_ITLB_MISS; |
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} else if (e >= 0) { |
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update_itlb_use(env, e); |
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} |
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return e;
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} |
321 |
|
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/* Find utlb entry
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Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
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static int find_utlb_entry(CPUSH4State * env, target_ulong address, int use_asid) |
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{ |
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/* per utlb access */
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increment_urc(env); |
328 |
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/* Return entry */
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return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
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} |
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|
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/* Match address against MMU
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Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
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MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
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MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
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MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
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MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
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*/
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static int get_mmu_address(CPUSH4State * env, target_ulong * physical, |
341 |
int *prot, target_ulong address,
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int rw, int access_type) |
343 |
{ |
344 |
int use_asid, n;
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tlb_t *matching = NULL;
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346 |
|
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use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0; |
348 |
|
349 |
if (rw == 2) { |
350 |
n = find_itlb_entry(env, address, use_asid); |
351 |
if (n >= 0) { |
352 |
matching = &env->itlb[n]; |
353 |
if (!(env->sr & SR_MD) && !(matching->pr & 2)) |
354 |
n = MMU_ITLB_VIOLATION; |
355 |
else
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356 |
*prot = PAGE_EXEC; |
357 |
} else {
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358 |
n = find_utlb_entry(env, address, use_asid); |
359 |
if (n >= 0) { |
360 |
n = copy_utlb_entry_itlb(env, n); |
361 |
matching = &env->itlb[n]; |
362 |
if (!(env->sr & SR_MD) && !(matching->pr & 2)) { |
363 |
n = MMU_ITLB_VIOLATION; |
364 |
} else {
|
365 |
*prot = PAGE_READ | PAGE_EXEC; |
366 |
if ((matching->pr & 1) && matching->d) { |
367 |
*prot |= PAGE_WRITE; |
368 |
} |
369 |
} |
370 |
} else if (n == MMU_DTLB_MULTIPLE) { |
371 |
n = MMU_ITLB_MULTIPLE; |
372 |
} else if (n == MMU_DTLB_MISS) { |
373 |
n = MMU_ITLB_MISS; |
374 |
} |
375 |
} |
376 |
} else {
|
377 |
n = find_utlb_entry(env, address, use_asid); |
378 |
if (n >= 0) { |
379 |
matching = &env->utlb[n]; |
380 |
if (!(env->sr & SR_MD) && !(matching->pr & 2)) { |
381 |
n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
|
382 |
MMU_DTLB_VIOLATION_READ; |
383 |
} else if ((rw == 1) && !(matching->pr & 1)) { |
384 |
n = MMU_DTLB_VIOLATION_WRITE; |
385 |
} else if ((rw == 1) && !matching->d) { |
386 |
n = MMU_DTLB_INITIAL_WRITE; |
387 |
} else {
|
388 |
*prot = PAGE_READ; |
389 |
if ((matching->pr & 1) && matching->d) { |
390 |
*prot |= PAGE_WRITE; |
391 |
} |
392 |
} |
393 |
} else if (n == MMU_DTLB_MISS) { |
394 |
n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
|
395 |
MMU_DTLB_MISS_READ; |
396 |
} |
397 |
} |
398 |
if (n >= 0) { |
399 |
n = MMU_OK; |
400 |
*physical = ((matching->ppn << 10) & ~(matching->size - 1)) | |
401 |
(address & (matching->size - 1));
|
402 |
} |
403 |
return n;
|
404 |
} |
405 |
|
406 |
static int get_physical_address(CPUSH4State * env, target_ulong * physical, |
407 |
int *prot, target_ulong address,
|
408 |
int rw, int access_type) |
409 |
{ |
410 |
/* P1, P2 and P4 areas do not use translation */
|
411 |
if ((address >= 0x80000000 && address < 0xc0000000) || |
412 |
address >= 0xe0000000) {
|
413 |
if (!(env->sr & SR_MD)
|
414 |
&& (address < 0xe0000000 || address >= 0xe4000000)) { |
415 |
/* Unauthorized access in user mode (only store queues are available) */
|
416 |
fprintf(stderr, "Unauthorized access\n");
|
417 |
if (rw == 0) |
418 |
return MMU_DADDR_ERROR_READ;
|
419 |
else if (rw == 1) |
420 |
return MMU_DADDR_ERROR_WRITE;
|
421 |
else
|
422 |
return MMU_IADDR_ERROR;
|
423 |
} |
424 |
if (address >= 0x80000000 && address < 0xc0000000) { |
425 |
/* Mask upper 3 bits for P1 and P2 areas */
|
426 |
*physical = address & 0x1fffffff;
|
427 |
} else {
|
428 |
*physical = address; |
429 |
} |
430 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
431 |
return MMU_OK;
|
432 |
} |
433 |
|
434 |
/* If MMU is disabled, return the corresponding physical page */
|
435 |
if (!(env->mmucr & MMUCR_AT)) {
|
436 |
*physical = address & 0x1FFFFFFF;
|
437 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
438 |
return MMU_OK;
|
439 |
} |
440 |
|
441 |
/* We need to resort to the MMU */
|
442 |
return get_mmu_address(env, physical, prot, address, rw, access_type);
|
443 |
} |
444 |
|
445 |
int cpu_sh4_handle_mmu_fault(CPUSH4State * env, target_ulong address, int rw, |
446 |
int mmu_idx)
|
447 |
{ |
448 |
target_ulong physical; |
449 |
int prot, ret, access_type;
|
450 |
|
451 |
access_type = ACCESS_INT; |
452 |
ret = |
453 |
get_physical_address(env, &physical, &prot, address, rw, |
454 |
access_type); |
455 |
|
456 |
if (ret != MMU_OK) {
|
457 |
env->tea = address; |
458 |
if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
|
459 |
env->pteh = (env->pteh & PTEH_ASID_MASK) | |
460 |
(address & PTEH_VPN_MASK); |
461 |
} |
462 |
switch (ret) {
|
463 |
case MMU_ITLB_MISS:
|
464 |
case MMU_DTLB_MISS_READ:
|
465 |
env->exception_index = 0x040;
|
466 |
break;
|
467 |
case MMU_DTLB_MULTIPLE:
|
468 |
case MMU_ITLB_MULTIPLE:
|
469 |
env->exception_index = 0x140;
|
470 |
break;
|
471 |
case MMU_ITLB_VIOLATION:
|
472 |
env->exception_index = 0x0a0;
|
473 |
break;
|
474 |
case MMU_DTLB_MISS_WRITE:
|
475 |
env->exception_index = 0x060;
|
476 |
break;
|
477 |
case MMU_DTLB_INITIAL_WRITE:
|
478 |
env->exception_index = 0x080;
|
479 |
break;
|
480 |
case MMU_DTLB_VIOLATION_READ:
|
481 |
env->exception_index = 0x0a0;
|
482 |
break;
|
483 |
case MMU_DTLB_VIOLATION_WRITE:
|
484 |
env->exception_index = 0x0c0;
|
485 |
break;
|
486 |
case MMU_IADDR_ERROR:
|
487 |
case MMU_DADDR_ERROR_READ:
|
488 |
env->exception_index = 0x0e0;
|
489 |
break;
|
490 |
case MMU_DADDR_ERROR_WRITE:
|
491 |
env->exception_index = 0x100;
|
492 |
break;
|
493 |
default:
|
494 |
cpu_abort(env, "Unhandled MMU fault");
|
495 |
} |
496 |
return 1; |
497 |
} |
498 |
|
499 |
address &= TARGET_PAGE_MASK; |
500 |
physical &= TARGET_PAGE_MASK; |
501 |
|
502 |
tlb_set_page(env, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE); |
503 |
return 0; |
504 |
} |
505 |
|
506 |
hwaddr cpu_get_phys_page_debug(CPUSH4State * env, target_ulong addr) |
507 |
{ |
508 |
target_ulong physical; |
509 |
int prot;
|
510 |
|
511 |
get_physical_address(env, &physical, &prot, addr, 0, 0); |
512 |
return physical;
|
513 |
} |
514 |
|
515 |
void cpu_load_tlb(CPUSH4State * env)
|
516 |
{ |
517 |
int n = cpu_mmucr_urc(env->mmucr);
|
518 |
tlb_t * entry = &env->utlb[n]; |
519 |
|
520 |
if (entry->v) {
|
521 |
/* Overwriting valid entry in utlb. */
|
522 |
target_ulong address = entry->vpn << 10;
|
523 |
tlb_flush_page(env, address); |
524 |
} |
525 |
|
526 |
/* Take values into cpu status from registers. */
|
527 |
entry->asid = (uint8_t)cpu_pteh_asid(env->pteh); |
528 |
entry->vpn = cpu_pteh_vpn(env->pteh); |
529 |
entry->v = (uint8_t)cpu_ptel_v(env->ptel); |
530 |
entry->ppn = cpu_ptel_ppn(env->ptel); |
531 |
entry->sz = (uint8_t)cpu_ptel_sz(env->ptel); |
532 |
switch (entry->sz) {
|
533 |
case 0: /* 00 */ |
534 |
entry->size = 1024; /* 1K */ |
535 |
break;
|
536 |
case 1: /* 01 */ |
537 |
entry->size = 1024 * 4; /* 4K */ |
538 |
break;
|
539 |
case 2: /* 10 */ |
540 |
entry->size = 1024 * 64; /* 64K */ |
541 |
break;
|
542 |
case 3: /* 11 */ |
543 |
entry->size = 1024 * 1024; /* 1M */ |
544 |
break;
|
545 |
default:
|
546 |
cpu_abort(env, "Unhandled load_tlb");
|
547 |
break;
|
548 |
} |
549 |
entry->sh = (uint8_t)cpu_ptel_sh(env->ptel); |
550 |
entry->c = (uint8_t)cpu_ptel_c(env->ptel); |
551 |
entry->pr = (uint8_t)cpu_ptel_pr(env->ptel); |
552 |
entry->d = (uint8_t)cpu_ptel_d(env->ptel); |
553 |
entry->wt = (uint8_t)cpu_ptel_wt(env->ptel); |
554 |
entry->sa = (uint8_t)cpu_ptea_sa(env->ptea); |
555 |
entry->tc = (uint8_t)cpu_ptea_tc(env->ptea); |
556 |
} |
557 |
|
558 |
void cpu_sh4_invalidate_tlb(CPUSH4State *s)
|
559 |
{ |
560 |
int i;
|
561 |
|
562 |
/* UTLB */
|
563 |
for (i = 0; i < UTLB_SIZE; i++) { |
564 |
tlb_t * entry = &s->utlb[i]; |
565 |
entry->v = 0;
|
566 |
} |
567 |
/* ITLB */
|
568 |
for (i = 0; i < ITLB_SIZE; i++) { |
569 |
tlb_t * entry = &s->itlb[i]; |
570 |
entry->v = 0;
|
571 |
} |
572 |
|
573 |
tlb_flush(s, 1);
|
574 |
} |
575 |
|
576 |
uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s, |
577 |
hwaddr addr) |
578 |
{ |
579 |
int index = (addr & 0x00000300) >> 8; |
580 |
tlb_t * entry = &s->itlb[index]; |
581 |
|
582 |
return (entry->vpn << 10) | |
583 |
(entry->v << 8) |
|
584 |
(entry->asid); |
585 |
} |
586 |
|
587 |
void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
|
588 |
uint32_t mem_value) |
589 |
{ |
590 |
uint32_t vpn = (mem_value & 0xfffffc00) >> 10; |
591 |
uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8); |
592 |
uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
|
593 |
|
594 |
int index = (addr & 0x00000300) >> 8; |
595 |
tlb_t * entry = &s->itlb[index]; |
596 |
if (entry->v) {
|
597 |
/* Overwriting valid entry in itlb. */
|
598 |
target_ulong address = entry->vpn << 10;
|
599 |
tlb_flush_page(s, address); |
600 |
} |
601 |
entry->asid = asid; |
602 |
entry->vpn = vpn; |
603 |
entry->v = v; |
604 |
} |
605 |
|
606 |
uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s, |
607 |
hwaddr addr) |
608 |
{ |
609 |
int array = (addr & 0x00800000) >> 23; |
610 |
int index = (addr & 0x00000300) >> 8; |
611 |
tlb_t * entry = &s->itlb[index]; |
612 |
|
613 |
if (array == 0) { |
614 |
/* ITLB Data Array 1 */
|
615 |
return (entry->ppn << 10) | |
616 |
(entry->v << 8) |
|
617 |
(entry->pr << 5) |
|
618 |
((entry->sz & 1) << 6) | |
619 |
((entry->sz & 2) << 4) | |
620 |
(entry->c << 3) |
|
621 |
(entry->sh << 1);
|
622 |
} else {
|
623 |
/* ITLB Data Array 2 */
|
624 |
return (entry->tc << 1) | |
625 |
(entry->sa); |
626 |
} |
627 |
} |
628 |
|
629 |
void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
|
630 |
uint32_t mem_value) |
631 |
{ |
632 |
int array = (addr & 0x00800000) >> 23; |
633 |
int index = (addr & 0x00000300) >> 8; |
634 |
tlb_t * entry = &s->itlb[index]; |
635 |
|
636 |
if (array == 0) { |
637 |
/* ITLB Data Array 1 */
|
638 |
if (entry->v) {
|
639 |
/* Overwriting valid entry in utlb. */
|
640 |
target_ulong address = entry->vpn << 10;
|
641 |
tlb_flush_page(s, address); |
642 |
} |
643 |
entry->ppn = (mem_value & 0x1ffffc00) >> 10; |
644 |
entry->v = (mem_value & 0x00000100) >> 8; |
645 |
entry->sz = (mem_value & 0x00000080) >> 6 | |
646 |
(mem_value & 0x00000010) >> 4; |
647 |
entry->pr = (mem_value & 0x00000040) >> 5; |
648 |
entry->c = (mem_value & 0x00000008) >> 3; |
649 |
entry->sh = (mem_value & 0x00000002) >> 1; |
650 |
} else {
|
651 |
/* ITLB Data Array 2 */
|
652 |
entry->tc = (mem_value & 0x00000008) >> 3; |
653 |
entry->sa = (mem_value & 0x00000007);
|
654 |
} |
655 |
} |
656 |
|
657 |
uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s, |
658 |
hwaddr addr) |
659 |
{ |
660 |
int index = (addr & 0x00003f00) >> 8; |
661 |
tlb_t * entry = &s->utlb[index]; |
662 |
|
663 |
increment_urc(s); /* per utlb access */
|
664 |
|
665 |
return (entry->vpn << 10) | |
666 |
(entry->v << 8) |
|
667 |
(entry->asid); |
668 |
} |
669 |
|
670 |
void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
|
671 |
uint32_t mem_value) |
672 |
{ |
673 |
int associate = addr & 0x0000080; |
674 |
uint32_t vpn = (mem_value & 0xfffffc00) >> 10; |
675 |
uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9); |
676 |
uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8); |
677 |
uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
|
678 |
int use_asid = (s->mmucr & MMUCR_SV) == 0 || (s->sr & SR_MD) == 0; |
679 |
|
680 |
if (associate) {
|
681 |
int i;
|
682 |
tlb_t * utlb_match_entry = NULL;
|
683 |
int needs_tlb_flush = 0; |
684 |
|
685 |
/* search UTLB */
|
686 |
for (i = 0; i < UTLB_SIZE; i++) { |
687 |
tlb_t * entry = &s->utlb[i]; |
688 |
if (!entry->v)
|
689 |
continue;
|
690 |
|
691 |
if (entry->vpn == vpn
|
692 |
&& (!use_asid || entry->asid == asid || entry->sh)) { |
693 |
if (utlb_match_entry) {
|
694 |
/* Multiple TLB Exception */
|
695 |
s->exception_index = 0x140;
|
696 |
s->tea = addr; |
697 |
break;
|
698 |
} |
699 |
if (entry->v && !v)
|
700 |
needs_tlb_flush = 1;
|
701 |
entry->v = v; |
702 |
entry->d = d; |
703 |
utlb_match_entry = entry; |
704 |
} |
705 |
increment_urc(s); /* per utlb access */
|
706 |
} |
707 |
|
708 |
/* search ITLB */
|
709 |
for (i = 0; i < ITLB_SIZE; i++) { |
710 |
tlb_t * entry = &s->itlb[i]; |
711 |
if (entry->vpn == vpn
|
712 |
&& (!use_asid || entry->asid == asid || entry->sh)) { |
713 |
if (entry->v && !v)
|
714 |
needs_tlb_flush = 1;
|
715 |
if (utlb_match_entry)
|
716 |
*entry = *utlb_match_entry; |
717 |
else
|
718 |
entry->v = v; |
719 |
break;
|
720 |
} |
721 |
} |
722 |
|
723 |
if (needs_tlb_flush)
|
724 |
tlb_flush_page(s, vpn << 10);
|
725 |
|
726 |
} else {
|
727 |
int index = (addr & 0x00003f00) >> 8; |
728 |
tlb_t * entry = &s->utlb[index]; |
729 |
if (entry->v) {
|
730 |
/* Overwriting valid entry in utlb. */
|
731 |
target_ulong address = entry->vpn << 10;
|
732 |
tlb_flush_page(s, address); |
733 |
} |
734 |
entry->asid = asid; |
735 |
entry->vpn = vpn; |
736 |
entry->d = d; |
737 |
entry->v = v; |
738 |
increment_urc(s); |
739 |
} |
740 |
} |
741 |
|
742 |
uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s, |
743 |
hwaddr addr) |
744 |
{ |
745 |
int array = (addr & 0x00800000) >> 23; |
746 |
int index = (addr & 0x00003f00) >> 8; |
747 |
tlb_t * entry = &s->utlb[index]; |
748 |
|
749 |
increment_urc(s); /* per utlb access */
|
750 |
|
751 |
if (array == 0) { |
752 |
/* ITLB Data Array 1 */
|
753 |
return (entry->ppn << 10) | |
754 |
(entry->v << 8) |
|
755 |
(entry->pr << 5) |
|
756 |
((entry->sz & 1) << 6) | |
757 |
((entry->sz & 2) << 4) | |
758 |
(entry->c << 3) |
|
759 |
(entry->d << 2) |
|
760 |
(entry->sh << 1) |
|
761 |
(entry->wt); |
762 |
} else {
|
763 |
/* ITLB Data Array 2 */
|
764 |
return (entry->tc << 1) | |
765 |
(entry->sa); |
766 |
} |
767 |
} |
768 |
|
769 |
void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
|
770 |
uint32_t mem_value) |
771 |
{ |
772 |
int array = (addr & 0x00800000) >> 23; |
773 |
int index = (addr & 0x00003f00) >> 8; |
774 |
tlb_t * entry = &s->utlb[index]; |
775 |
|
776 |
increment_urc(s); /* per utlb access */
|
777 |
|
778 |
if (array == 0) { |
779 |
/* UTLB Data Array 1 */
|
780 |
if (entry->v) {
|
781 |
/* Overwriting valid entry in utlb. */
|
782 |
target_ulong address = entry->vpn << 10;
|
783 |
tlb_flush_page(s, address); |
784 |
} |
785 |
entry->ppn = (mem_value & 0x1ffffc00) >> 10; |
786 |
entry->v = (mem_value & 0x00000100) >> 8; |
787 |
entry->sz = (mem_value & 0x00000080) >> 6 | |
788 |
(mem_value & 0x00000010) >> 4; |
789 |
entry->pr = (mem_value & 0x00000060) >> 5; |
790 |
entry->c = (mem_value & 0x00000008) >> 3; |
791 |
entry->d = (mem_value & 0x00000004) >> 2; |
792 |
entry->sh = (mem_value & 0x00000002) >> 1; |
793 |
entry->wt = (mem_value & 0x00000001);
|
794 |
} else {
|
795 |
/* UTLB Data Array 2 */
|
796 |
entry->tc = (mem_value & 0x00000008) >> 3; |
797 |
entry->sa = (mem_value & 0x00000007);
|
798 |
} |
799 |
} |
800 |
|
801 |
int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
|
802 |
{ |
803 |
int n;
|
804 |
int use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0; |
805 |
|
806 |
/* check area */
|
807 |
if (env->sr & SR_MD) {
|
808 |
/* For previledged mode, P2 and P4 area is not cachable. */
|
809 |
if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr) |
810 |
return 0; |
811 |
} else {
|
812 |
/* For user mode, only U0 area is cachable. */
|
813 |
if (0x80000000 <= addr) |
814 |
return 0; |
815 |
} |
816 |
|
817 |
/*
|
818 |
* TODO : Evaluate CCR and check if the cache is on or off.
|
819 |
* Now CCR is not in CPUSH4State, but in SH7750State.
|
820 |
* When you move the ccr into CPUSH4State, the code will be
|
821 |
* as follows.
|
822 |
*/
|
823 |
#if 0
|
824 |
/* check if operand cache is enabled or not. */
|
825 |
if (!(env->ccr & 1))
|
826 |
return 0;
|
827 |
#endif
|
828 |
|
829 |
/* if MMU is off, no check for TLB. */
|
830 |
if (env->mmucr & MMUCR_AT)
|
831 |
return 1; |
832 |
|
833 |
/* check TLB */
|
834 |
n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid); |
835 |
if (n >= 0) |
836 |
return env->itlb[n].c;
|
837 |
|
838 |
n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid); |
839 |
if (n >= 0) |
840 |
return env->utlb[n].c;
|
841 |
|
842 |
return 0; |
843 |
} |
844 |
|
845 |
#endif
|