Browse Source
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@722 c046a42c-6fe2-441c-8c8c-71466251a162stable-0.10
bellard
22 years ago
24 changed files with 1523 additions and 863 deletions
@ -0,0 +1,486 @@ |
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/*
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* QEMU M48T59 NVRAM emulation for PPC PREP platform |
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* |
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* Copyright (c) 2003-2004 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 <stdlib.h> |
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#include <stdio.h> /* needed by vl.h */ |
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#include <stdint.h> |
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#include <string.h> |
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#include <time.h> |
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#include "vl.h" |
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//#define NVRAM_DEBUG
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#if defined(NVRAM_DEBUG) |
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#define NVRAM_PRINTF(fmt, args...) do { printf(fmt , ##args); } while (0) |
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#else |
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#define NVRAM_PRINTF(fmt, args...) do { } while (0) |
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#endif |
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typedef struct m48t59_t { |
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/* Hardware parameters */ |
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int IRQ; |
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uint32_t io_base; |
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uint16_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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time_t 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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uint16_t addr; |
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uint8_t *buffer; |
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} m48t59_t; |
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static m48t59_t *NVRAMs; |
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static int nb_NVRAMs; |
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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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/* RTC management helpers */ |
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static void get_time (m48t59_t *NVRAM, struct tm *tm) |
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{ |
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time_t t; |
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t = time(NULL) + NVRAM->time_offset; |
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localtime_r(&t, tm); |
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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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time_t now, new_time; |
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new_time = mktime(tm); |
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now = time(NULL); |
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NVRAM->time_offset = new_time - now; |
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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, tm_now; |
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uint64_t next_time; |
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m48t59_t *NVRAM = opaque; |
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pic_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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get_time(NVRAM, &tm_now); |
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memcpy(&tm, &tm_now, sizeof(struct tm)); |
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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 = mktime(&tm); |
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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 + mktime(&tm_now); |
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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 + mktime(&tm_now); |
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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 + mktime(&tm_now); |
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} else { |
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/* Repeat once a second */ |
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next_time = 1 + mktime(&tm_now); |
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} |
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qemu_mod_timer(NVRAM->alrm_timer, next_time * 1000); |
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pic_set_irq(NVRAM->IRQ, 0); |
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} |
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static void get_alarm (m48t59_t *NVRAM, struct tm *tm) |
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{ |
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localtime_r(&NVRAM->alarm, tm); |
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} |
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static void set_alarm (m48t59_t *NVRAM, struct tm *tm) |
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{ |
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NVRAM->alarm = mktime(tm); |
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if (NVRAM->alrm_timer != NULL) { |
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qemu_del_timer(NVRAM->alrm_timer); |
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NVRAM->alrm_timer = NULL; |
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} |
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if (NVRAM->alarm - time(NULL) > 0) |
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qemu_mod_timer(NVRAM->alrm_timer, NVRAM->alarm * 1000); |
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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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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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// reset_CPU();
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} else { |
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pic_set_irq(NVRAM->IRQ, 1); |
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pic_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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if (NVRAM->wd_timer != NULL) { |
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qemu_del_timer(NVRAM->wd_timer); |
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NVRAM->wd_timer = NULL; |
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} |
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NVRAM->buffer[0x1FF0] &= ~0x80; |
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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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/* Direct access to NVRAM */ |
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void m48t59_write (void *opaque, 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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if (NVRAM->addr > 0x1FF8 && NVRAM->addr < 0x2000) |
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NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, NVRAM->addr, val); |
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switch (NVRAM->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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get_alarm(NVRAM, &tm); |
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tm.tm_sec = tmp; |
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NVRAM->buffer[0x1FF2] = val; |
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set_alarm(NVRAM, &tm); |
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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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get_alarm(NVRAM, &tm); |
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tm.tm_min = tmp; |
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NVRAM->buffer[0x1FF3] = val; |
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set_alarm(NVRAM, &tm); |
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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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get_alarm(NVRAM, &tm); |
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tm.tm_hour = tmp; |
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NVRAM->buffer[0x1FF4] = val; |
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set_alarm(NVRAM, &tm); |
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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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get_alarm(NVRAM, &tm); |
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tm.tm_mday = tmp; |
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NVRAM->buffer[0x1FF5] = val; |
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set_alarm(NVRAM, &tm); |
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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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/* control */ |
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NVRAM->buffer[0x1FF8] = (val & ~0xA0) | 0x90; |
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break; |
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case 0x1FF9: |
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/* seconds (BCD) */ |
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tmp = fromBCD(val & 0x7F); |
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if (tmp >= 0 && tmp <= 59) { |
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get_time(NVRAM, &tm); |
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tm.tm_sec = tmp; |
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set_time(NVRAM, &tm); |
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} |
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if ((val & 0x80) ^ (NVRAM->buffer[0x1FF9] & 0x80)) { |
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if (val & 0x80) { |
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NVRAM->stop_time = time(NULL); |
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} else { |
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NVRAM->time_offset += NVRAM->stop_time - time(NULL); |
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NVRAM->stop_time = 0; |
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} |
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} |
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NVRAM->buffer[0x1FF9] = val & 0x80; |
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break; |
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case 0x1FFA: |
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/* minutes (BCD) */ |
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tmp = fromBCD(val & 0x7F); |
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if (tmp >= 0 && tmp <= 59) { |
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get_time(NVRAM, &tm); |
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tm.tm_min = tmp; |
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set_time(NVRAM, &tm); |
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} |
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break; |
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case 0x1FFB: |
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/* hours (BCD) */ |
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tmp = fromBCD(val & 0x3F); |
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if (tmp >= 0 && tmp <= 23) { |
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get_time(NVRAM, &tm); |
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tm.tm_hour = tmp; |
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set_time(NVRAM, &tm); |
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} |
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break; |
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case 0x1FFC: |
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/* day of the week / century */ |
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tmp = fromBCD(val & 0x07); |
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get_time(NVRAM, &tm); |
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tm.tm_wday = tmp; |
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set_time(NVRAM, &tm); |
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NVRAM->buffer[0x1FFC] = val & 0x40; |
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break; |
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case 0x1FFD: |
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/* date */ |
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tmp = fromBCD(val & 0x1F); |
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if (tmp != 0) { |
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get_time(NVRAM, &tm); |
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tm.tm_mday = tmp; |
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set_time(NVRAM, &tm); |
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} |
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break; |
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case 0x1FFE: |
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/* month */ |
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tmp = fromBCD(val & 0x1F); |
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if (tmp >= 1 && tmp <= 12) { |
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get_time(NVRAM, &tm); |
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tm.tm_mon = tmp - 1; |
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set_time(NVRAM, &tm); |
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} |
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break; |
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case 0x1FFF: |
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/* year */ |
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tmp = fromBCD(val); |
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if (tmp >= 0 && tmp <= 99) { |
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get_time(NVRAM, &tm); |
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tm.tm_year = fromBCD(val); |
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set_time(NVRAM, &tm); |
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} |
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break; |
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default: |
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if (NVRAM->addr < 0x1FF0 || |
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(NVRAM->addr > 0x1FFF && NVRAM->addr < NVRAM->size)) { |
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NVRAM->buffer[NVRAM->addr] = val & 0xFF; |
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} |
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break; |
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} |
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} |
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uint32_t m48t59_read (void *opaque) |
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{ |
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m48t59_t *NVRAM = opaque; |
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struct tm tm; |
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uint32_t retval = 0xFF; |
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switch (NVRAM->addr) { |
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case 0x1FF0: |
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/* flags register */ |
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goto do_read; |
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case 0x1FF1: |
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/* unused */ |
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retval = 0; |
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break; |
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case 0x1FF2: |
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/* alarm seconds */ |
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goto do_read; |
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case 0x1FF3: |
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/* alarm minutes */ |
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goto do_read; |
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case 0x1FF4: |
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/* alarm hours */ |
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goto do_read; |
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case 0x1FF5: |
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/* alarm date */ |
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goto do_read; |
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case 0x1FF6: |
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/* interrupts */ |
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goto do_read; |
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case 0x1FF7: |
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/* A read resets the watchdog */ |
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set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]); |
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goto do_read; |
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case 0x1FF8: |
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/* control */ |
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goto do_read; |
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case 0x1FF9: |
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/* seconds (BCD) */ |
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get_time(NVRAM, &tm); |
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retval = (NVRAM->buffer[0x1FF9] & 0x80) | toBCD(tm.tm_sec); |
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break; |
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case 0x1FFA: |
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/* minutes (BCD) */ |
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get_time(NVRAM, &tm); |
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retval = toBCD(tm.tm_min); |
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break; |
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case 0x1FFB: |
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/* hours (BCD) */ |
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get_time(NVRAM, &tm); |
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retval = toBCD(tm.tm_hour); |
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break; |
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case 0x1FFC: |
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/* day of the week / century */ |
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get_time(NVRAM, &tm); |
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retval = NVRAM->buffer[0x1FFC] | tm.tm_wday; |
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break; |
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case 0x1FFD: |
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/* date */ |
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get_time(NVRAM, &tm); |
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retval = toBCD(tm.tm_mday); |
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break; |
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case 0x1FFE: |
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/* month */ |
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get_time(NVRAM, &tm); |
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retval = toBCD(tm.tm_mon + 1); |
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break; |
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case 0x1FFF: |
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/* year */ |
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get_time(NVRAM, &tm); |
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retval = toBCD(tm.tm_year); |
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break; |
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default: |
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if (NVRAM->addr < 0x1FF0 || |
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(NVRAM->addr > 0x1FFF && NVRAM->addr < NVRAM->size)) { |
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do_read: |
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retval = NVRAM->buffer[NVRAM->addr]; |
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} |
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break; |
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} |
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if (NVRAM->addr > 0x1FF9 && NVRAM->addr < 0x2000) |
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NVRAM_PRINTF("0x%08x <= 0x%08x\n", NVRAM->addr, retval); |
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return retval; |
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} |
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void m48t59_set_addr (void *opaque, uint32_t addr) |
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{ |
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m48t59_t *NVRAM = opaque; |
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NVRAM->addr = addr; |
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} |
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/* IO access to NVRAM */ |
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static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val) |
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{ |
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m48t59_t *NVRAM = opaque; |
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addr -= NVRAM->io_base; |
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switch (addr) { |
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case 0: |
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NVRAM->addr &= ~0x00FF; |
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NVRAM->addr |= val; |
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break; |
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case 1: |
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NVRAM->addr &= ~0xFF00; |
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NVRAM->addr |= val << 8; |
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break; |
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case 3: |
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m48t59_write(NVRAM, val); |
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NVRAM->addr = 0x0000; |
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break; |
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default: |
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break; |
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} |
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} |
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static uint32_t NVRAM_readb (void *opaque, uint32_t addr) |
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{ |
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m48t59_t *NVRAM = opaque; |
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if (addr == NVRAM->io_base + 3) |
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return m48t59_read(NVRAM); |
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return 0xFF; |
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} |
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/* Initialisation routine */ |
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void *m48t59_init (int IRQ, uint32_t io_base, uint16_t size) |
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{ |
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m48t59_t *tmp; |
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tmp = realloc(NVRAMs, (nb_NVRAMs + 1) * sizeof(m48t59_t)); |
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if (tmp == NULL) |
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return NULL; |
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NVRAMs = tmp; |
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tmp[nb_NVRAMs].buffer = malloc(size); |
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if (tmp[nb_NVRAMs].buffer == NULL) |
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return NULL; |
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memset(tmp[nb_NVRAMs].buffer, 0, size); |
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tmp[nb_NVRAMs].IRQ = IRQ; |
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tmp[nb_NVRAMs].size = size; |
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tmp[nb_NVRAMs].io_base = io_base; |
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tmp[nb_NVRAMs].addr = 0; |
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register_ioport_read(io_base, 0x04, 1, NVRAM_readb, &NVRAMs[nb_NVRAMs]); |
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register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, &NVRAMs[nb_NVRAMs]); |
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tmp[nb_NVRAMs].alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, |
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&tmp[nb_NVRAMs]); |
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tmp[nb_NVRAMs].wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, |
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&tmp[nb_NVRAMs]); |
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return &NVRAMs[nb_NVRAMs++]; |
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} |
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@ -0,0 +1,9 @@ |
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#if !defined (__M48T59_H__) |
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#define __M48T59_H__ |
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|
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void m48t59_write (void *opaque, uint32_t val); |
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uint32_t m48t59_read (void *opaque); |
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void m48t59_set_addr (void *opaque, uint32_t addr); |
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void *m48t59_init (int IRQ, uint32_t io_base, uint16_t size); |
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#endif /* !defined (__M48T59_H__) */ |
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@ -0,0 +1,42 @@ |
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/*
|
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* QEMU generic PPC hardware System Emulator |
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* |
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* Copyright (c) 2003-2004 Jocelyn Mayer |
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* |
|||
* Permission is hereby granted, free of charge, to any person obtaining a copy |
|||
* 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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|
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#include <stdio.h> |
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#include "vl.h" |
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|
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void ppc_prep_init (int ram_size, int vga_ram_size, int boot_device, |
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DisplayState *ds, const char **fd_filename, int snapshot, |
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const char *kernel_filename, const char *kernel_cmdline, |
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const char *initrd_filename); |
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|
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void ppc_init (int ram_size, int vga_ram_size, int boot_device, |
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DisplayState *ds, const char **fd_filename, int snapshot, |
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const char *kernel_filename, const char *kernel_cmdline, |
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const char *initrd_filename) |
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{ |
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/* For now, only PREP is supported */ |
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return ppc_prep_init(ram_size, vga_ram_size, boot_device, ds, fd_filename, |
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snapshot, kernel_filename, kernel_cmdline, |
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initrd_filename); |
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} |
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Loading…
Reference in new issue