--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/m48t59.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,655 @@
+/*
+ * QEMU M48T59 and M48T08 NVRAM emulation for PPC PREP and Sparc platforms
+ *
+ * Copyright (c) 2003-2005, 2007 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw.h"
+#include "nvram.h"
+#include "isa.h"
+#include "qemu-timer.h"
+#include "sysemu.h"
+
+//#define DEBUG_NVRAM
+
+#if defined(DEBUG_NVRAM)
+#define NVRAM_PRINTF(fmt, args...) do { printf(fmt , ##args); } while (0)
+#else
+#define NVRAM_PRINTF(fmt, args...) do { } while (0)
+#endif
+
+/*
+ * The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has
+ * alarm and a watchdog timer and related control registers. In the
+ * PPC platform there is also a nvram lock function.
+ */
+struct m48t59_t {
+ /* Model parameters */
+ int type; // 2 = m48t02, 8 = m48t08, 59 = m48t59
+ /* Hardware parameters */
+ qemu_irq IRQ;
+ int mem_index;
+ uint32_t io_base;
+ uint16_t size;
+ /* RTC management */
+ time_t time_offset;
+ time_t stop_time;
+ /* Alarm & watchdog */
+ struct tm alarm;
+ struct QEMUTimer *alrm_timer;
+ struct QEMUTimer *wd_timer;
+ /* NVRAM storage */
+ uint8_t lock;
+ uint16_t addr;
+ uint8_t *buffer;
+};
+
+/* Fake timer functions */
+/* Generic helpers for BCD */
+static inline uint8_t toBCD (uint8_t value)
+{
+ return (((value / 10) % 10) << 4) | (value % 10);
+}
+
+static inline uint8_t fromBCD (uint8_t BCD)
+{
+ return ((BCD >> 4) * 10) + (BCD & 0x0F);
+}
+
+/* Alarm management */
+static void alarm_cb (void *opaque)
+{
+ struct tm tm;
+ uint64_t next_time;
+ m48t59_t *NVRAM = opaque;
+
+ qemu_set_irq(NVRAM->IRQ, 1);
+ if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 &&
+ (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
+ (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
+ (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
+ /* Repeat once a month */
+ qemu_get_timedate(&tm, NVRAM->time_offset);
+ tm.tm_mon++;
+ if (tm.tm_mon == 13) {
+ tm.tm_mon = 1;
+ tm.tm_year++;
+ }
+ next_time = qemu_timedate_diff(&tm) - NVRAM->time_offset;
+ } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
+ (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
+ (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
+ (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
+ /* Repeat once a day */
+ next_time = 24 * 60 * 60;
+ } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
+ (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
+ (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
+ (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
+ /* Repeat once an hour */
+ next_time = 60 * 60;
+ } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
+ (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
+ (NVRAM->buffer[0x1FF3] & 0x80) != 0 &&
+ (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
+ /* Repeat once a minute */
+ next_time = 60;
+ } else {
+ /* Repeat once a second */
+ next_time = 1;
+ }
+ qemu_mod_timer(NVRAM->alrm_timer, qemu_get_clock(vm_clock) +
+ next_time * 1000);
+ qemu_set_irq(NVRAM->IRQ, 0);
+}
+
+static void set_alarm (m48t59_t *NVRAM)
+{
+ int diff;
+ if (NVRAM->alrm_timer != NULL) {
+ qemu_del_timer(NVRAM->alrm_timer);
+ diff = qemu_timedate_diff(&NVRAM->alarm) - NVRAM->time_offset;
+ if (diff > 0)
+ qemu_mod_timer(NVRAM->alrm_timer, diff * 1000);
+ }
+}
+
+/* RTC management helpers */
+static inline void get_time (m48t59_t *NVRAM, struct tm *tm)
+{
+ qemu_get_timedate(tm, NVRAM->time_offset);
+}
+
+static void set_time (m48t59_t *NVRAM, struct tm *tm)
+{
+ NVRAM->time_offset = qemu_timedate_diff(tm);
+ set_alarm(NVRAM);
+}
+
+/* Watchdog management */
+static void watchdog_cb (void *opaque)
+{
+ m48t59_t *NVRAM = opaque;
+
+ NVRAM->buffer[0x1FF0] |= 0x80;
+ if (NVRAM->buffer[0x1FF7] & 0x80) {
+ NVRAM->buffer[0x1FF7] = 0x00;
+ NVRAM->buffer[0x1FFC] &= ~0x40;
+ /* May it be a hw CPU Reset instead ? */
+ qemu_system_reset_request();
+ } else {
+ qemu_set_irq(NVRAM->IRQ, 1);
+ qemu_set_irq(NVRAM->IRQ, 0);
+ }
+}
+
+static void set_up_watchdog (m48t59_t *NVRAM, uint8_t value)
+{
+ uint64_t interval; /* in 1/16 seconds */
+
+ NVRAM->buffer[0x1FF0] &= ~0x80;
+ if (NVRAM->wd_timer != NULL) {
+ qemu_del_timer(NVRAM->wd_timer);
+ if (value != 0) {
+ interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F);
+ qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) +
+ ((interval * 1000) >> 4));
+ }
+ }
+}
+
+/* Direct access to NVRAM */
+void m48t59_write (void *opaque, uint32_t addr, uint32_t val)
+{
+ m48t59_t *NVRAM = opaque;
+ struct tm tm;
+ int tmp;
+
+ if (addr > 0x1FF8 && addr < 0x2000)
+ NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
+
+ /* check for NVRAM access */
+ if ((NVRAM->type == 2 && addr < 0x7f8) ||
+ (NVRAM->type == 8 && addr < 0x1ff8) ||
+ (NVRAM->type == 59 && addr < 0x1ff0))
+ goto do_write;
+
+ /* TOD access */
+ switch (addr) {
+ case 0x1FF0:
+ /* flags register : read-only */
+ break;
+ case 0x1FF1:
+ /* unused */
+ break;
+ case 0x1FF2:
+ /* alarm seconds */
+ tmp = fromBCD(val & 0x7F);
+ if (tmp >= 0 && tmp <= 59) {
+ NVRAM->alarm.tm_sec = tmp;
+ NVRAM->buffer[0x1FF2] = val;
+ set_alarm(NVRAM);
+ }
+ break;
+ case 0x1FF3:
+ /* alarm minutes */
+ tmp = fromBCD(val & 0x7F);
+ if (tmp >= 0 && tmp <= 59) {
+ NVRAM->alarm.tm_min = tmp;
+ NVRAM->buffer[0x1FF3] = val;
+ set_alarm(NVRAM);
+ }
+ break;
+ case 0x1FF4:
+ /* alarm hours */
+ tmp = fromBCD(val & 0x3F);
+ if (tmp >= 0 && tmp <= 23) {
+ NVRAM->alarm.tm_hour = tmp;
+ NVRAM->buffer[0x1FF4] = val;
+ set_alarm(NVRAM);
+ }
+ break;
+ case 0x1FF5:
+ /* alarm date */
+ tmp = fromBCD(val & 0x1F);
+ if (tmp != 0) {
+ NVRAM->alarm.tm_mday = tmp;
+ NVRAM->buffer[0x1FF5] = val;
+ set_alarm(NVRAM);
+ }
+ break;
+ case 0x1FF6:
+ /* interrupts */
+ NVRAM->buffer[0x1FF6] = val;
+ break;
+ case 0x1FF7:
+ /* watchdog */
+ NVRAM->buffer[0x1FF7] = val;
+ set_up_watchdog(NVRAM, val);
+ break;
+ case 0x1FF8:
+ case 0x07F8:
+ /* control */
+ NVRAM->buffer[addr] = (val & ~0xA0) | 0x90;
+ break;
+ case 0x1FF9:
+ case 0x07F9:
+ /* seconds (BCD) */
+ tmp = fromBCD(val & 0x7F);
+ if (tmp >= 0 && tmp <= 59) {
+ get_time(NVRAM, &tm);
+ tm.tm_sec = tmp;
+ set_time(NVRAM, &tm);
+ }
+ if ((val & 0x80) ^ (NVRAM->buffer[addr] & 0x80)) {
+ if (val & 0x80) {
+ NVRAM->stop_time = time(NULL);
+ } else {
+ NVRAM->time_offset += NVRAM->stop_time - time(NULL);
+ NVRAM->stop_time = 0;
+ }
+ }
+ NVRAM->buffer[addr] = val & 0x80;
+ break;
+ case 0x1FFA:
+ case 0x07FA:
+ /* minutes (BCD) */
+ tmp = fromBCD(val & 0x7F);
+ if (tmp >= 0 && tmp <= 59) {
+ get_time(NVRAM, &tm);
+ tm.tm_min = tmp;
+ set_time(NVRAM, &tm);
+ }
+ break;
+ case 0x1FFB:
+ case 0x07FB:
+ /* hours (BCD) */
+ tmp = fromBCD(val & 0x3F);
+ if (tmp >= 0 && tmp <= 23) {
+ get_time(NVRAM, &tm);
+ tm.tm_hour = tmp;
+ set_time(NVRAM, &tm);
+ }
+ break;
+ case 0x1FFC:
+ case 0x07FC:
+ /* day of the week / century */
+ tmp = fromBCD(val & 0x07);
+ get_time(NVRAM, &tm);
+ tm.tm_wday = tmp;
+ set_time(NVRAM, &tm);
+ NVRAM->buffer[addr] = val & 0x40;
+ break;
+ case 0x1FFD:
+ case 0x07FD:
+ /* date */
+ tmp = fromBCD(val & 0x1F);
+ if (tmp != 0) {
+ get_time(NVRAM, &tm);
+ tm.tm_mday = tmp;
+ set_time(NVRAM, &tm);
+ }
+ break;
+ case 0x1FFE:
+ case 0x07FE:
+ /* month */
+ tmp = fromBCD(val & 0x1F);
+ if (tmp >= 1 && tmp <= 12) {
+ get_time(NVRAM, &tm);
+ tm.tm_mon = tmp - 1;
+ set_time(NVRAM, &tm);
+ }
+ break;
+ case 0x1FFF:
+ case 0x07FF:
+ /* year */
+ tmp = fromBCD(val);
+ if (tmp >= 0 && tmp <= 99) {
+ get_time(NVRAM, &tm);
+ if (NVRAM->type == 8)
+ tm.tm_year = fromBCD(val) + 68; // Base year is 1968
+ else
+ tm.tm_year = fromBCD(val);
+ set_time(NVRAM, &tm);
+ }
+ break;
+ default:
+ /* Check lock registers state */
+ if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
+ break;
+ if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
+ break;
+ do_write:
+ if (addr < NVRAM->size) {
+ NVRAM->buffer[addr] = val & 0xFF;
+ }
+ break;
+ }
+}
+
+uint32_t m48t59_read (void *opaque, uint32_t addr)
+{
+ m48t59_t *NVRAM = opaque;
+ struct tm tm;
+ uint32_t retval = 0xFF;
+
+ /* check for NVRAM access */
+ if ((NVRAM->type == 2 && addr < 0x078f) ||
+ (NVRAM->type == 8 && addr < 0x1ff8) ||
+ (NVRAM->type == 59 && addr < 0x1ff0))
+ goto do_read;
+
+ /* TOD access */
+ switch (addr) {
+ case 0x1FF0:
+ /* flags register */
+ goto do_read;
+ case 0x1FF1:
+ /* unused */
+ retval = 0;
+ break;
+ case 0x1FF2:
+ /* alarm seconds */
+ goto do_read;
+ case 0x1FF3:
+ /* alarm minutes */
+ goto do_read;
+ case 0x1FF4:
+ /* alarm hours */
+ goto do_read;
+ case 0x1FF5:
+ /* alarm date */
+ goto do_read;
+ case 0x1FF6:
+ /* interrupts */
+ goto do_read;
+ case 0x1FF7:
+ /* A read resets the watchdog */
+ set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);
+ goto do_read;
+ case 0x1FF8:
+ case 0x07F8:
+ /* control */
+ goto do_read;
+ case 0x1FF9:
+ case 0x07F9:
+ /* seconds (BCD) */
+ get_time(NVRAM, &tm);
+ retval = (NVRAM->buffer[addr] & 0x80) | toBCD(tm.tm_sec);
+ break;
+ case 0x1FFA:
+ case 0x07FA:
+ /* minutes (BCD) */
+ get_time(NVRAM, &tm);
+ retval = toBCD(tm.tm_min);
+ break;
+ case 0x1FFB:
+ case 0x07FB:
+ /* hours (BCD) */
+ get_time(NVRAM, &tm);
+ retval = toBCD(tm.tm_hour);
+ break;
+ case 0x1FFC:
+ case 0x07FC:
+ /* day of the week / century */
+ get_time(NVRAM, &tm);
+ retval = NVRAM->buffer[addr] | tm.tm_wday;
+ break;
+ case 0x1FFD:
+ case 0x07FD:
+ /* date */
+ get_time(NVRAM, &tm);
+ retval = toBCD(tm.tm_mday);
+ break;
+ case 0x1FFE:
+ case 0x07FE:
+ /* month */
+ get_time(NVRAM, &tm);
+ retval = toBCD(tm.tm_mon + 1);
+ break;
+ case 0x1FFF:
+ case 0x07FF:
+ /* year */
+ get_time(NVRAM, &tm);
+ if (NVRAM->type == 8)
+ retval = toBCD(tm.tm_year - 68); // Base year is 1968
+ else
+ retval = toBCD(tm.tm_year);
+ break;
+ default:
+ /* Check lock registers state */
+ if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
+ break;
+ if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
+ break;
+ do_read:
+ if (addr < NVRAM->size) {
+ retval = NVRAM->buffer[addr];
+ }
+ break;
+ }
+ if (addr > 0x1FF9 && addr < 0x2000)
+ NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
+
+ return retval;
+}
+
+void m48t59_set_addr (void *opaque, uint32_t addr)
+{
+ m48t59_t *NVRAM = opaque;
+
+ NVRAM->addr = addr;
+}
+
+void m48t59_toggle_lock (void *opaque, int lock)
+{
+ m48t59_t *NVRAM = opaque;
+
+ NVRAM->lock ^= 1 << lock;
+}
+
+/* IO access to NVRAM */
+static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val)
+{
+ m48t59_t *NVRAM = opaque;
+
+ addr -= NVRAM->io_base;
+ NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
+ switch (addr) {
+ case 0:
+ NVRAM->addr &= ~0x00FF;
+ NVRAM->addr |= val;
+ break;
+ case 1:
+ NVRAM->addr &= ~0xFF00;
+ NVRAM->addr |= val << 8;
+ break;
+ case 3:
+ m48t59_write(NVRAM, val, NVRAM->addr);
+ NVRAM->addr = 0x0000;
+ break;
+ default:
+ break;
+ }
+}
+
+static uint32_t NVRAM_readb (void *opaque, uint32_t addr)
+{
+ m48t59_t *NVRAM = opaque;
+ uint32_t retval;
+
+ addr -= NVRAM->io_base;
+ switch (addr) {
+ case 3:
+ retval = m48t59_read(NVRAM, NVRAM->addr);
+ break;
+ default:
+ retval = -1;
+ break;
+ }
+ NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
+
+ return retval;
+}
+
+static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
+{
+ m48t59_t *NVRAM = opaque;
+
+ m48t59_write(NVRAM, addr, value & 0xff);
+}
+
+static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
+{
+ m48t59_t *NVRAM = opaque;
+
+ m48t59_write(NVRAM, addr, (value >> 8) & 0xff);
+ m48t59_write(NVRAM, addr + 1, value & 0xff);
+}
+
+static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
+{
+ m48t59_t *NVRAM = opaque;
+
+ m48t59_write(NVRAM, addr, (value >> 24) & 0xff);
+ m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff);
+ m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff);
+ m48t59_write(NVRAM, addr + 3, value & 0xff);
+}
+
+static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)
+{
+ m48t59_t *NVRAM = opaque;
+ uint32_t retval;
+
+ retval = m48t59_read(NVRAM, addr);
+ return retval;
+}
+
+static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)
+{
+ m48t59_t *NVRAM = opaque;
+ uint32_t retval;
+
+ retval = m48t59_read(NVRAM, addr) << 8;
+ retval |= m48t59_read(NVRAM, addr + 1);
+ return retval;
+}
+
+static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)
+{
+ m48t59_t *NVRAM = opaque;
+ uint32_t retval;
+
+ retval = m48t59_read(NVRAM, addr) << 24;
+ retval |= m48t59_read(NVRAM, addr + 1) << 16;
+ retval |= m48t59_read(NVRAM, addr + 2) << 8;
+ retval |= m48t59_read(NVRAM, addr + 3);
+ return retval;
+}
+
+static CPUWriteMemoryFunc *nvram_write[] = {
+ &nvram_writeb,
+ &nvram_writew,
+ &nvram_writel,
+};
+
+static CPUReadMemoryFunc *nvram_read[] = {
+ &nvram_readb,
+ &nvram_readw,
+ &nvram_readl,
+};
+
+static void m48t59_save(QEMUFile *f, void *opaque)
+{
+ m48t59_t *s = opaque;
+
+ qemu_put_8s(f, &s->lock);
+ qemu_put_be16s(f, &s->addr);
+ qemu_put_buffer(f, s->buffer, s->size);
+}
+
+static int m48t59_load(QEMUFile *f, void *opaque, int version_id)
+{
+ m48t59_t *s = opaque;
+
+ if (version_id != 1)
+ return -EINVAL;
+
+ qemu_get_8s(f, &s->lock);
+ qemu_get_be16s(f, &s->addr);
+ qemu_get_buffer(f, s->buffer, s->size);
+
+ return 0;
+}
+
+static void m48t59_reset(void *opaque)
+{
+ m48t59_t *NVRAM = opaque;
+
+ if (NVRAM->alrm_timer != NULL)
+ qemu_del_timer(NVRAM->alrm_timer);
+
+ if (NVRAM->wd_timer != NULL)
+ qemu_del_timer(NVRAM->wd_timer);
+}
+
+/* Initialisation routine */
+m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base,
+ uint32_t io_base, uint16_t size,
+ int type)
+{
+ m48t59_t *s;
+ target_phys_addr_t save_base;
+
+ s = qemu_mallocz(sizeof(m48t59_t));
+ if (!s)
+ return NULL;
+ s->buffer = qemu_mallocz(size);
+ if (!s->buffer) {
+ qemu_free(s);
+ return NULL;
+ }
+ s->IRQ = IRQ;
+ s->size = size;
+ s->io_base = io_base;
+ s->addr = 0;
+ s->type = type;
+ if (io_base != 0) {
+ register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s);
+ register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s);
+ }
+ if (mem_base != 0) {
+ s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s);
+ cpu_register_physical_memory(mem_base, size, s->mem_index);
+ }
+ if (type == 59) {
+ s->alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, s);
+ s->wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, s);
+ }
+ s->lock = 0;
+ qemu_get_timedate(&s->alarm, 0);
+
+ qemu_register_reset(m48t59_reset, s);
+ save_base = mem_base ? mem_base : io_base;
+ register_savevm("m48t59", save_base, 1, m48t59_save, m48t59_load, s);
+
+ return s;
+}