root / hw / m48t59.c @ 930f3fe1
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/*
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* QEMU M48T59 and M48T08 NVRAM emulation for PPC PREP and Sparc platforms
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*
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* Copyright (c) 2003-2005, 2007 Jocelyn Mayer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h" |
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#include "nvram.h" |
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#include "qemu-timer.h" |
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#include "sysemu.h" |
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#include "sysbus.h" |
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#include "isa.h" |
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//#define DEBUG_NVRAM
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#if defined(DEBUG_NVRAM)
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#define NVRAM_PRINTF(fmt, ...) do { printf(fmt , ## __VA_ARGS__); } while (0) |
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#else
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#define NVRAM_PRINTF(fmt, ...) do { } while (0) |
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#endif
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/*
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* The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has
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* alarm and a watchdog timer and related control registers. In the
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* PPC platform there is also a nvram lock function.
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*/
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/*
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* Chipset docs:
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* http://www.st.com/stonline/products/literature/ds/2410/m48t02.pdf
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* http://www.st.com/stonline/products/literature/ds/2411/m48t08.pdf
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* http://www.st.com/stonline/products/literature/od/7001/m48t59y.pdf
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*/
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struct m48t59_t {
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/* Model parameters */
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uint32_t type; // 2 = m48t02, 8 = m48t08, 59 = m48t59
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/* Hardware parameters */
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qemu_irq IRQ; |
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uint32_t io_base; |
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uint32_t size; |
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/* RTC management */
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time_t time_offset; |
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time_t stop_time; |
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/* Alarm & watchdog */
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struct tm alarm;
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struct QEMUTimer *alrm_timer;
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struct QEMUTimer *wd_timer;
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/* NVRAM storage */
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uint8_t lock; |
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uint16_t addr; |
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uint8_t *buffer; |
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}; |
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typedef struct M48t59ISAState { |
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ISADevice busdev; |
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m48t59_t state; |
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} M48t59ISAState; |
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typedef struct M48t59SysBusState { |
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SysBusDevice busdev; |
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m48t59_t state; |
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} M48t59SysBusState; |
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|
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/* Fake timer functions */
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/* Generic helpers for BCD */
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static inline uint8_t toBCD (uint8_t value) |
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{
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return (((value / 10) % 10) << 4) | (value % 10); |
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} |
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static inline uint8_t fromBCD (uint8_t BCD) |
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{
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return ((BCD >> 4) * 10) + (BCD & 0x0F); |
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} |
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|
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/* Alarm management */
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static void alarm_cb (void *opaque) |
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{
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struct tm tm;
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uint64_t next_time; |
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m48t59_t *NVRAM = opaque; |
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|
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qemu_set_irq(NVRAM->IRQ, 1);
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if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 && |
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(NVRAM->buffer[0x1FF4] & 0x80) == 0 && |
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(NVRAM->buffer[0x1FF3] & 0x80) == 0 && |
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(NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
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/* Repeat once a month */
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qemu_get_timedate(&tm, NVRAM->time_offset); |
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tm.tm_mon++; |
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if (tm.tm_mon == 13) { |
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tm.tm_mon = 1;
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tm.tm_year++; |
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} |
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next_time = qemu_timedate_diff(&tm) - NVRAM->time_offset; |
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} else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 && |
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(NVRAM->buffer[0x1FF4] & 0x80) == 0 && |
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(NVRAM->buffer[0x1FF3] & 0x80) == 0 && |
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(NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
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/* Repeat once a day */
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next_time = 24 * 60 * 60; |
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} else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 && |
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(NVRAM->buffer[0x1FF4] & 0x80) != 0 && |
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(NVRAM->buffer[0x1FF3] & 0x80) == 0 && |
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(NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
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/* Repeat once an hour */
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next_time = 60 * 60; |
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} else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 && |
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(NVRAM->buffer[0x1FF4] & 0x80) != 0 && |
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(NVRAM->buffer[0x1FF3] & 0x80) != 0 && |
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(NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
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/* Repeat once a minute */
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next_time = 60;
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} else {
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/* Repeat once a second */
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next_time = 1;
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} |
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qemu_mod_timer(NVRAM->alrm_timer, qemu_get_clock(vm_clock) + |
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next_time * 1000);
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qemu_set_irq(NVRAM->IRQ, 0);
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} |
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static void set_alarm (m48t59_t *NVRAM) |
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{
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int diff;
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if (NVRAM->alrm_timer != NULL) { |
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qemu_del_timer(NVRAM->alrm_timer); |
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diff = qemu_timedate_diff(&NVRAM->alarm) - NVRAM->time_offset; |
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if (diff > 0) |
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qemu_mod_timer(NVRAM->alrm_timer, diff * 1000);
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} |
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} |
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/* RTC management helpers */
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static inline void get_time (m48t59_t *NVRAM, struct tm *tm) |
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{
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qemu_get_timedate(tm, NVRAM->time_offset); |
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} |
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static void set_time (m48t59_t *NVRAM, struct tm *tm) |
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{
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NVRAM->time_offset = qemu_timedate_diff(tm); |
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set_alarm(NVRAM); |
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} |
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|
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/* Watchdog management */
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static void watchdog_cb (void *opaque) |
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{
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m48t59_t *NVRAM = opaque; |
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|
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NVRAM->buffer[0x1FF0] |= 0x80; |
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if (NVRAM->buffer[0x1FF7] & 0x80) { |
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NVRAM->buffer[0x1FF7] = 0x00; |
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NVRAM->buffer[0x1FFC] &= ~0x40; |
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/* May it be a hw CPU Reset instead ? */
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qemu_system_reset_request(); |
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} else {
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qemu_set_irq(NVRAM->IRQ, 1);
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qemu_set_irq(NVRAM->IRQ, 0);
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} |
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} |
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static void set_up_watchdog (m48t59_t *NVRAM, uint8_t value) |
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{
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uint64_t interval; /* in 1/16 seconds */
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NVRAM->buffer[0x1FF0] &= ~0x80; |
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if (NVRAM->wd_timer != NULL) { |
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qemu_del_timer(NVRAM->wd_timer); |
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if (value != 0) { |
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interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F); |
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qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) + |
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((interval * 1000) >> 4)); |
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} |
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} |
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} |
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|
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/* Direct access to NVRAM */
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void m48t59_write (void *opaque, uint32_t addr, uint32_t val) |
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{
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m48t59_t *NVRAM = opaque; |
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struct tm tm;
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int tmp;
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|
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if (addr > 0x1FF8 && addr < 0x2000) |
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NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
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/* check for NVRAM access */
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if ((NVRAM->type == 2 && addr < 0x7f8) || |
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(NVRAM->type == 8 && addr < 0x1ff8) || |
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(NVRAM->type == 59 && addr < 0x1ff0)) |
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goto do_write;
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|
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/* TOD access */
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switch (addr) {
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case 0x1FF0: |
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/* flags register : read-only */
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break;
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case 0x1FF1: |
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/* unused */
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break;
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case 0x1FF2: |
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/* alarm seconds */
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tmp = fromBCD(val & 0x7F);
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if (tmp >= 0 && tmp <= 59) { |
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NVRAM->alarm.tm_sec = tmp; |
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NVRAM->buffer[0x1FF2] = val;
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set_alarm(NVRAM); |
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} |
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break;
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case 0x1FF3: |
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/* alarm minutes */
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tmp = fromBCD(val & 0x7F);
|
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if (tmp >= 0 && tmp <= 59) { |
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NVRAM->alarm.tm_min = tmp; |
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NVRAM->buffer[0x1FF3] = val;
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set_alarm(NVRAM); |
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} |
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break;
|
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case 0x1FF4: |
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/* alarm hours */
|
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tmp = fromBCD(val & 0x3F);
|
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if (tmp >= 0 && tmp <= 23) { |
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NVRAM->alarm.tm_hour = tmp; |
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NVRAM->buffer[0x1FF4] = val;
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set_alarm(NVRAM); |
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} |
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break;
|
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case 0x1FF5: |
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/* alarm date */
|
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tmp = fromBCD(val & 0x1F);
|
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if (tmp != 0) { |
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NVRAM->alarm.tm_mday = tmp; |
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NVRAM->buffer[0x1FF5] = val;
|
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set_alarm(NVRAM); |
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} |
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break;
|
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case 0x1FF6: |
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/* interrupts */
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NVRAM->buffer[0x1FF6] = val;
|
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break;
|
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case 0x1FF7: |
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/* watchdog */
|
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NVRAM->buffer[0x1FF7] = val;
|
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set_up_watchdog(NVRAM, val); |
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break;
|
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case 0x1FF8: |
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case 0x07F8: |
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/* control */
|
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NVRAM->buffer[addr] = (val & ~0xA0) | 0x90; |
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break;
|
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case 0x1FF9: |
| 271 |
case 0x07F9: |
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/* seconds (BCD) */
|
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tmp = fromBCD(val & 0x7F);
|
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if (tmp >= 0 && tmp <= 59) { |
| 275 |
get_time(NVRAM, &tm); |
| 276 |
tm.tm_sec = tmp; |
| 277 |
set_time(NVRAM, &tm); |
| 278 |
} |
| 279 |
if ((val & 0x80) ^ (NVRAM->buffer[addr] & 0x80)) { |
| 280 |
if (val & 0x80) { |
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NVRAM->stop_time = time(NULL);
|
| 282 |
} else {
|
| 283 |
NVRAM->time_offset += NVRAM->stop_time - time(NULL);
|
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NVRAM->stop_time = 0;
|
| 285 |
} |
| 286 |
} |
| 287 |
NVRAM->buffer[addr] = val & 0x80;
|
| 288 |
break;
|
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case 0x1FFA: |
| 290 |
case 0x07FA: |
| 291 |
/* minutes (BCD) */
|
| 292 |
tmp = fromBCD(val & 0x7F);
|
| 293 |
if (tmp >= 0 && tmp <= 59) { |
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get_time(NVRAM, &tm); |
| 295 |
tm.tm_min = tmp; |
| 296 |
set_time(NVRAM, &tm); |
| 297 |
} |
| 298 |
break;
|
| 299 |
case 0x1FFB: |
| 300 |
case 0x07FB: |
| 301 |
/* hours (BCD) */
|
| 302 |
tmp = fromBCD(val & 0x3F);
|
| 303 |
if (tmp >= 0 && tmp <= 23) { |
| 304 |
get_time(NVRAM, &tm); |
| 305 |
tm.tm_hour = tmp; |
| 306 |
set_time(NVRAM, &tm); |
| 307 |
} |
| 308 |
break;
|
| 309 |
case 0x1FFC: |
| 310 |
case 0x07FC: |
| 311 |
/* day of the week / century */
|
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tmp = fromBCD(val & 0x07);
|
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get_time(NVRAM, &tm); |
| 314 |
tm.tm_wday = tmp; |
| 315 |
set_time(NVRAM, &tm); |
| 316 |
NVRAM->buffer[addr] = val & 0x40;
|
| 317 |
break;
|
| 318 |
case 0x1FFD: |
| 319 |
case 0x07FD: |
| 320 |
/* date */
|
| 321 |
tmp = fromBCD(val & 0x1F);
|
| 322 |
if (tmp != 0) { |
| 323 |
get_time(NVRAM, &tm); |
| 324 |
tm.tm_mday = tmp; |
| 325 |
set_time(NVRAM, &tm); |
| 326 |
} |
| 327 |
break;
|
| 328 |
case 0x1FFE: |
| 329 |
case 0x07FE: |
| 330 |
/* month */
|
| 331 |
tmp = fromBCD(val & 0x1F);
|
| 332 |
if (tmp >= 1 && tmp <= 12) { |
| 333 |
get_time(NVRAM, &tm); |
| 334 |
tm.tm_mon = tmp - 1;
|
| 335 |
set_time(NVRAM, &tm); |
| 336 |
} |
| 337 |
break;
|
| 338 |
case 0x1FFF: |
| 339 |
case 0x07FF: |
| 340 |
/* year */
|
| 341 |
tmp = fromBCD(val); |
| 342 |
if (tmp >= 0 && tmp <= 99) { |
| 343 |
get_time(NVRAM, &tm); |
| 344 |
if (NVRAM->type == 8) |
| 345 |
tm.tm_year = fromBCD(val) + 68; // Base year is 1968 |
| 346 |
else
|
| 347 |
tm.tm_year = fromBCD(val); |
| 348 |
set_time(NVRAM, &tm); |
| 349 |
} |
| 350 |
break;
|
| 351 |
default:
|
| 352 |
/* Check lock registers state */
|
| 353 |
if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1)) |
| 354 |
break;
|
| 355 |
if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2)) |
| 356 |
break;
|
| 357 |
do_write:
|
| 358 |
if (addr < NVRAM->size) {
|
| 359 |
NVRAM->buffer[addr] = val & 0xFF;
|
| 360 |
} |
| 361 |
break;
|
| 362 |
} |
| 363 |
} |
| 364 |
|
| 365 |
uint32_t m48t59_read (void *opaque, uint32_t addr)
|
| 366 |
{
|
| 367 |
m48t59_t *NVRAM = opaque; |
| 368 |
struct tm tm;
|
| 369 |
uint32_t retval = 0xFF;
|
| 370 |
|
| 371 |
/* check for NVRAM access */
|
| 372 |
if ((NVRAM->type == 2 && addr < 0x078f) || |
| 373 |
(NVRAM->type == 8 && addr < 0x1ff8) || |
| 374 |
(NVRAM->type == 59 && addr < 0x1ff0)) |
| 375 |
goto do_read;
|
| 376 |
|
| 377 |
/* TOD access */
|
| 378 |
switch (addr) {
|
| 379 |
case 0x1FF0: |
| 380 |
/* flags register */
|
| 381 |
goto do_read;
|
| 382 |
case 0x1FF1: |
| 383 |
/* unused */
|
| 384 |
retval = 0;
|
| 385 |
break;
|
| 386 |
case 0x1FF2: |
| 387 |
/* alarm seconds */
|
| 388 |
goto do_read;
|
| 389 |
case 0x1FF3: |
| 390 |
/* alarm minutes */
|
| 391 |
goto do_read;
|
| 392 |
case 0x1FF4: |
| 393 |
/* alarm hours */
|
| 394 |
goto do_read;
|
| 395 |
case 0x1FF5: |
| 396 |
/* alarm date */
|
| 397 |
goto do_read;
|
| 398 |
case 0x1FF6: |
| 399 |
/* interrupts */
|
| 400 |
goto do_read;
|
| 401 |
case 0x1FF7: |
| 402 |
/* A read resets the watchdog */
|
| 403 |
set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);
|
| 404 |
goto do_read;
|
| 405 |
case 0x1FF8: |
| 406 |
case 0x07F8: |
| 407 |
/* control */
|
| 408 |
goto do_read;
|
| 409 |
case 0x1FF9: |
| 410 |
case 0x07F9: |
| 411 |
/* seconds (BCD) */
|
| 412 |
get_time(NVRAM, &tm); |
| 413 |
retval = (NVRAM->buffer[addr] & 0x80) | toBCD(tm.tm_sec);
|
| 414 |
break;
|
| 415 |
case 0x1FFA: |
| 416 |
case 0x07FA: |
| 417 |
/* minutes (BCD) */
|
| 418 |
get_time(NVRAM, &tm); |
| 419 |
retval = toBCD(tm.tm_min); |
| 420 |
break;
|
| 421 |
case 0x1FFB: |
| 422 |
case 0x07FB: |
| 423 |
/* hours (BCD) */
|
| 424 |
get_time(NVRAM, &tm); |
| 425 |
retval = toBCD(tm.tm_hour); |
| 426 |
break;
|
| 427 |
case 0x1FFC: |
| 428 |
case 0x07FC: |
| 429 |
/* day of the week / century */
|
| 430 |
get_time(NVRAM, &tm); |
| 431 |
retval = NVRAM->buffer[addr] | tm.tm_wday; |
| 432 |
break;
|
| 433 |
case 0x1FFD: |
| 434 |
case 0x07FD: |
| 435 |
/* date */
|
| 436 |
get_time(NVRAM, &tm); |
| 437 |
retval = toBCD(tm.tm_mday); |
| 438 |
break;
|
| 439 |
case 0x1FFE: |
| 440 |
case 0x07FE: |
| 441 |
/* month */
|
| 442 |
get_time(NVRAM, &tm); |
| 443 |
retval = toBCD(tm.tm_mon + 1);
|
| 444 |
break;
|
| 445 |
case 0x1FFF: |
| 446 |
case 0x07FF: |
| 447 |
/* year */
|
| 448 |
get_time(NVRAM, &tm); |
| 449 |
if (NVRAM->type == 8) |
| 450 |
retval = toBCD(tm.tm_year - 68); // Base year is 1968 |
| 451 |
else
|
| 452 |
retval = toBCD(tm.tm_year); |
| 453 |
break;
|
| 454 |
default:
|
| 455 |
/* Check lock registers state */
|
| 456 |
if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1)) |
| 457 |
break;
|
| 458 |
if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2)) |
| 459 |
break;
|
| 460 |
do_read:
|
| 461 |
if (addr < NVRAM->size) {
|
| 462 |
retval = NVRAM->buffer[addr]; |
| 463 |
} |
| 464 |
break;
|
| 465 |
} |
| 466 |
if (addr > 0x1FF9 && addr < 0x2000) |
| 467 |
NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
|
| 468 |
|
| 469 |
return retval;
|
| 470 |
} |
| 471 |
|
| 472 |
void m48t59_set_addr (void *opaque, uint32_t addr) |
| 473 |
{
|
| 474 |
m48t59_t *NVRAM = opaque; |
| 475 |
|
| 476 |
NVRAM->addr = addr; |
| 477 |
} |
| 478 |
|
| 479 |
void m48t59_toggle_lock (void *opaque, int lock) |
| 480 |
{
|
| 481 |
m48t59_t *NVRAM = opaque; |
| 482 |
|
| 483 |
NVRAM->lock ^= 1 << lock;
|
| 484 |
} |
| 485 |
|
| 486 |
/* IO access to NVRAM */
|
| 487 |
static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val) |
| 488 |
{
|
| 489 |
m48t59_t *NVRAM = opaque; |
| 490 |
|
| 491 |
addr -= NVRAM->io_base; |
| 492 |
NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
|
| 493 |
switch (addr) {
|
| 494 |
case 0: |
| 495 |
NVRAM->addr &= ~0x00FF;
|
| 496 |
NVRAM->addr |= val; |
| 497 |
break;
|
| 498 |
case 1: |
| 499 |
NVRAM->addr &= ~0xFF00;
|
| 500 |
NVRAM->addr |= val << 8;
|
| 501 |
break;
|
| 502 |
case 3: |
| 503 |
m48t59_write(NVRAM, val, NVRAM->addr); |
| 504 |
NVRAM->addr = 0x0000;
|
| 505 |
break;
|
| 506 |
default:
|
| 507 |
break;
|
| 508 |
} |
| 509 |
} |
| 510 |
|
| 511 |
static uint32_t NVRAM_readb (void *opaque, uint32_t addr) |
| 512 |
{
|
| 513 |
m48t59_t *NVRAM = opaque; |
| 514 |
uint32_t retval; |
| 515 |
|
| 516 |
addr -= NVRAM->io_base; |
| 517 |
switch (addr) {
|
| 518 |
case 3: |
| 519 |
retval = m48t59_read(NVRAM, NVRAM->addr); |
| 520 |
break;
|
| 521 |
default:
|
| 522 |
retval = -1;
|
| 523 |
break;
|
| 524 |
} |
| 525 |
NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
|
| 526 |
|
| 527 |
return retval;
|
| 528 |
} |
| 529 |
|
| 530 |
static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value) |
| 531 |
{
|
| 532 |
m48t59_t *NVRAM = opaque; |
| 533 |
|
| 534 |
m48t59_write(NVRAM, addr, value & 0xff);
|
| 535 |
} |
| 536 |
|
| 537 |
static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value) |
| 538 |
{
|
| 539 |
m48t59_t *NVRAM = opaque; |
| 540 |
|
| 541 |
m48t59_write(NVRAM, addr, (value >> 8) & 0xff); |
| 542 |
m48t59_write(NVRAM, addr + 1, value & 0xff); |
| 543 |
} |
| 544 |
|
| 545 |
static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value) |
| 546 |
{
|
| 547 |
m48t59_t *NVRAM = opaque; |
| 548 |
|
| 549 |
m48t59_write(NVRAM, addr, (value >> 24) & 0xff); |
| 550 |
m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff); |
| 551 |
m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff); |
| 552 |
m48t59_write(NVRAM, addr + 3, value & 0xff); |
| 553 |
} |
| 554 |
|
| 555 |
static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr) |
| 556 |
{
|
| 557 |
m48t59_t *NVRAM = opaque; |
| 558 |
uint32_t retval; |
| 559 |
|
| 560 |
retval = m48t59_read(NVRAM, addr); |
| 561 |
return retval;
|
| 562 |
} |
| 563 |
|
| 564 |
static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr) |
| 565 |
{
|
| 566 |
m48t59_t *NVRAM = opaque; |
| 567 |
uint32_t retval; |
| 568 |
|
| 569 |
retval = m48t59_read(NVRAM, addr) << 8;
|
| 570 |
retval |= m48t59_read(NVRAM, addr + 1);
|
| 571 |
return retval;
|
| 572 |
} |
| 573 |
|
| 574 |
static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr) |
| 575 |
{
|
| 576 |
m48t59_t *NVRAM = opaque; |
| 577 |
uint32_t retval; |
| 578 |
|
| 579 |
retval = m48t59_read(NVRAM, addr) << 24;
|
| 580 |
retval |= m48t59_read(NVRAM, addr + 1) << 16; |
| 581 |
retval |= m48t59_read(NVRAM, addr + 2) << 8; |
| 582 |
retval |= m48t59_read(NVRAM, addr + 3);
|
| 583 |
return retval;
|
| 584 |
} |
| 585 |
|
| 586 |
static CPUWriteMemoryFunc * const nvram_write[] = { |
| 587 |
&nvram_writeb, |
| 588 |
&nvram_writew, |
| 589 |
&nvram_writel, |
| 590 |
}; |
| 591 |
|
| 592 |
static CPUReadMemoryFunc * const nvram_read[] = { |
| 593 |
&nvram_readb, |
| 594 |
&nvram_readw, |
| 595 |
&nvram_readl, |
| 596 |
}; |
| 597 |
|
| 598 |
static void m48t59_save(QEMUFile *f, void *opaque) |
| 599 |
{
|
| 600 |
m48t59_t *s = opaque; |
| 601 |
|
| 602 |
qemu_put_8s(f, &s->lock); |
| 603 |
qemu_put_be16s(f, &s->addr); |
| 604 |
qemu_put_buffer(f, s->buffer, s->size); |
| 605 |
} |
| 606 |
|
| 607 |
static int m48t59_load(QEMUFile *f, void *opaque, int version_id) |
| 608 |
{
|
| 609 |
m48t59_t *s = opaque; |
| 610 |
|
| 611 |
if (version_id != 1) |
| 612 |
return -EINVAL;
|
| 613 |
|
| 614 |
qemu_get_8s(f, &s->lock); |
| 615 |
qemu_get_be16s(f, &s->addr); |
| 616 |
qemu_get_buffer(f, s->buffer, s->size); |
| 617 |
|
| 618 |
return 0; |
| 619 |
} |
| 620 |
|
| 621 |
static void m48t59_reset(void *opaque) |
| 622 |
{
|
| 623 |
m48t59_t *NVRAM = opaque; |
| 624 |
|
| 625 |
NVRAM->addr = 0;
|
| 626 |
NVRAM->lock = 0;
|
| 627 |
if (NVRAM->alrm_timer != NULL) |
| 628 |
qemu_del_timer(NVRAM->alrm_timer); |
| 629 |
|
| 630 |
if (NVRAM->wd_timer != NULL) |
| 631 |
qemu_del_timer(NVRAM->wd_timer); |
| 632 |
} |
| 633 |
|
| 634 |
/* Initialisation routine */
|
| 635 |
m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base, |
| 636 |
uint32_t io_base, uint16_t size, |
| 637 |
int type)
|
| 638 |
{
|
| 639 |
DeviceState *dev; |
| 640 |
SysBusDevice *s; |
| 641 |
M48t59SysBusState *d; |
| 642 |
|
| 643 |
dev = qdev_create(NULL, "m48t59"); |
| 644 |
qdev_prop_set_uint32(dev, "type", type);
|
| 645 |
qdev_prop_set_uint32(dev, "size", size);
|
| 646 |
qdev_prop_set_uint32(dev, "io_base", io_base);
|
| 647 |
qdev_init_nofail(dev); |
| 648 |
s = sysbus_from_qdev(dev); |
| 649 |
sysbus_connect_irq(s, 0, IRQ);
|
| 650 |
if (io_base != 0) { |
| 651 |
register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s); |
| 652 |
register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s); |
| 653 |
} |
| 654 |
if (mem_base != 0) { |
| 655 |
sysbus_mmio_map(s, 0, mem_base);
|
| 656 |
} |
| 657 |
|
| 658 |
d = FROM_SYSBUS(M48t59SysBusState, s); |
| 659 |
|
| 660 |
return &d->state;
|
| 661 |
} |
| 662 |
|
| 663 |
m48t59_t *m48t59_init_isa(uint32_t io_base, uint16_t size, int type)
|
| 664 |
{
|
| 665 |
M48t59ISAState *d; |
| 666 |
ISADevice *dev; |
| 667 |
m48t59_t *s; |
| 668 |
|
| 669 |
dev = isa_create("m48t59_isa");
|
| 670 |
qdev_prop_set_uint32(&dev->qdev, "type", type);
|
| 671 |
qdev_prop_set_uint32(&dev->qdev, "size", size);
|
| 672 |
qdev_prop_set_uint32(&dev->qdev, "io_base", io_base);
|
| 673 |
qdev_init_nofail(&dev->qdev); |
| 674 |
d = DO_UPCAST(M48t59ISAState, busdev, dev); |
| 675 |
s = &d->state; |
| 676 |
|
| 677 |
if (io_base != 0) { |
| 678 |
register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s); |
| 679 |
register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s); |
| 680 |
} |
| 681 |
|
| 682 |
return s;
|
| 683 |
} |
| 684 |
|
| 685 |
static void m48t59_init_common(m48t59_t *s) |
| 686 |
{
|
| 687 |
s->buffer = qemu_mallocz(s->size); |
| 688 |
if (s->type == 59) { |
| 689 |
s->alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, s); |
| 690 |
s->wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, s); |
| 691 |
} |
| 692 |
qemu_get_timedate(&s->alarm, 0);
|
| 693 |
|
| 694 |
qemu_register_reset(m48t59_reset, s); |
| 695 |
register_savevm("m48t59", -1, 1, m48t59_save, m48t59_load, s); |
| 696 |
} |
| 697 |
|
| 698 |
static int m48t59_init_isa1(ISADevice *dev) |
| 699 |
{
|
| 700 |
M48t59ISAState *d = DO_UPCAST(M48t59ISAState, busdev, dev); |
| 701 |
m48t59_t *s = &d->state; |
| 702 |
|
| 703 |
isa_init_irq(dev, &s->IRQ, 8);
|
| 704 |
m48t59_init_common(s); |
| 705 |
|
| 706 |
return 0; |
| 707 |
} |
| 708 |
|
| 709 |
static int m48t59_init1(SysBusDevice *dev) |
| 710 |
{
|
| 711 |
M48t59SysBusState *d = FROM_SYSBUS(M48t59SysBusState, dev); |
| 712 |
m48t59_t *s = &d->state; |
| 713 |
int mem_index;
|
| 714 |
|
| 715 |
sysbus_init_irq(dev, &s->IRQ); |
| 716 |
|
| 717 |
mem_index = cpu_register_io_memory(nvram_read, nvram_write, s); |
| 718 |
sysbus_init_mmio(dev, s->size, mem_index); |
| 719 |
m48t59_init_common(s); |
| 720 |
|
| 721 |
return 0; |
| 722 |
} |
| 723 |
|
| 724 |
static ISADeviceInfo m48t59_isa_info = {
|
| 725 |
.init = m48t59_init_isa1, |
| 726 |
.qdev.name = "m48t59_isa",
|
| 727 |
.qdev.size = sizeof(M48t59ISAState),
|
| 728 |
.qdev.no_user = 1,
|
| 729 |
.qdev.props = (Property[]) {
|
| 730 |
DEFINE_PROP_UINT32("size", M48t59ISAState, state.size, -1), |
| 731 |
DEFINE_PROP_UINT32("type", M48t59ISAState, state.type, -1), |
| 732 |
DEFINE_PROP_HEX32( "io_base", M48t59ISAState, state.io_base, 0), |
| 733 |
DEFINE_PROP_END_OF_LIST(), |
| 734 |
} |
| 735 |
}; |
| 736 |
|
| 737 |
static SysBusDeviceInfo m48t59_info = {
|
| 738 |
.init = m48t59_init1, |
| 739 |
.qdev.name = "m48t59",
|
| 740 |
.qdev.size = sizeof(M48t59SysBusState),
|
| 741 |
.qdev.props = (Property[]) {
|
| 742 |
DEFINE_PROP_UINT32("size", M48t59SysBusState, state.size, -1), |
| 743 |
DEFINE_PROP_UINT32("type", M48t59SysBusState, state.type, -1), |
| 744 |
DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base, 0), |
| 745 |
DEFINE_PROP_END_OF_LIST(), |
| 746 |
} |
| 747 |
}; |
| 748 |
|
| 749 |
static void m48t59_register_devices(void) |
| 750 |
{
|
| 751 |
sysbus_register_withprop(&m48t59_info); |
| 752 |
isa_qdev_register(&m48t59_isa_info); |
| 753 |
} |
| 754 |
|
| 755 |
device_init(m48t59_register_devices) |