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/*
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* QEMU generic PowerPC hardware System Emulator
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*
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* Copyright (c) 2003-2007 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 "ppc.h" |
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#include "qemu-timer.h" |
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#include "sysemu.h" |
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#include "nvram.h" |
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#include "qemu-log.h" |
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#include "loader.h" |
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//#define PPC_DEBUG_IRQ
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//#define PPC_DEBUG_TB
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#ifdef PPC_DEBUG_IRQ
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# define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__) |
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#else
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# define LOG_IRQ(...) do { } while (0) |
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#endif
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#ifdef PPC_DEBUG_TB
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# define LOG_TB(...) qemu_log(__VA_ARGS__)
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#else
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# define LOG_TB(...) do { } while (0) |
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#endif
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static void cpu_ppc_tb_stop (CPUState *env); |
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static void cpu_ppc_tb_start (CPUState *env); |
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static void ppc_set_irq (CPUState *env, int n_IRQ, int level) |
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{ |
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if (level) {
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env->pending_interrupts |= 1 << n_IRQ;
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cpu_interrupt(env, CPU_INTERRUPT_HARD); |
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} else {
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env->pending_interrupts &= ~(1 << n_IRQ);
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if (env->pending_interrupts == 0) |
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cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); |
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} |
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LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
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"req %08x\n", __func__, env, n_IRQ, level,
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env->pending_interrupts, env->interrupt_request); |
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} |
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/* PowerPC 6xx / 7xx internal IRQ controller */
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static void ppc6xx_set_irq (void *opaque, int pin, int level) |
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{ |
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CPUState *env = opaque; |
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int cur_level;
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LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
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env, pin, level); |
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cur_level = (env->irq_input_state >> pin) & 1;
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/* Don't generate spurious events */
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if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { |
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switch (pin) {
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case PPC6xx_INPUT_TBEN:
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/* Level sensitive - active high */
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LOG_IRQ("%s: %s the time base\n",
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__func__, level ? "start" : "stop"); |
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if (level) {
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cpu_ppc_tb_start(env); |
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} else {
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cpu_ppc_tb_stop(env); |
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} |
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case PPC6xx_INPUT_INT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the external IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
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break;
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case PPC6xx_INPUT_SMI:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the SMI IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_SMI, level); |
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break;
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case PPC6xx_INPUT_MCP:
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/* Negative edge sensitive */
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/* XXX: TODO: actual reaction may depends on HID0 status
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* 603/604/740/750: check HID0[EMCP]
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*/
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if (cur_level == 1 && level == 0) { |
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LOG_IRQ("%s: raise machine check state\n",
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__func__); |
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ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
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} |
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break;
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case PPC6xx_INPUT_CKSTP_IN:
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/* Level sensitive - active low */
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/* XXX: TODO: relay the signal to CKSTP_OUT pin */
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/* XXX: Note that the only way to restart the CPU is to reset it */
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if (level) {
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LOG_IRQ("%s: stop the CPU\n", __func__);
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env->halted = 1;
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} |
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break;
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case PPC6xx_INPUT_HRESET:
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/* Level sensitive - active low */
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if (level) {
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LOG_IRQ("%s: reset the CPU\n", __func__);
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env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
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/* XXX: TOFIX */
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#if 0
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cpu_reset(env);
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#else
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qemu_system_reset_request(); |
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#endif
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} |
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break;
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case PPC6xx_INPUT_SRESET:
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LOG_IRQ("%s: set the RESET IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_RESET, level); |
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break;
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default:
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/* Unknown pin - do nothing */
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LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
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return;
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} |
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if (level)
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env->irq_input_state |= 1 << pin;
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else
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env->irq_input_state &= ~(1 << pin);
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} |
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} |
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void ppc6xx_irq_init (CPUState *env)
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{ |
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env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env,
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PPC6xx_INPUT_NB); |
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} |
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#if defined(TARGET_PPC64)
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/* PowerPC 970 internal IRQ controller */
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static void ppc970_set_irq (void *opaque, int pin, int level) |
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{ |
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CPUState *env = opaque; |
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int cur_level;
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LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
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env, pin, level); |
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cur_level = (env->irq_input_state >> pin) & 1;
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/* Don't generate spurious events */
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if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { |
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switch (pin) {
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case PPC970_INPUT_INT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the external IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
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break;
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case PPC970_INPUT_THINT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
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level); |
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ppc_set_irq(env, PPC_INTERRUPT_THERM, level); |
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break;
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case PPC970_INPUT_MCP:
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/* Negative edge sensitive */
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/* XXX: TODO: actual reaction may depends on HID0 status
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* 603/604/740/750: check HID0[EMCP]
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*/
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if (cur_level == 1 && level == 0) { |
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LOG_IRQ("%s: raise machine check state\n",
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__func__); |
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ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
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} |
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break;
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case PPC970_INPUT_CKSTP:
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/* Level sensitive - active low */
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/* XXX: TODO: relay the signal to CKSTP_OUT pin */
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if (level) {
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LOG_IRQ("%s: stop the CPU\n", __func__);
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env->halted = 1;
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} else {
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LOG_IRQ("%s: restart the CPU\n", __func__);
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env->halted = 0;
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} |
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break;
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case PPC970_INPUT_HRESET:
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/* Level sensitive - active low */
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if (level) {
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#if 0 // XXX: TOFIX
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LOG_IRQ("%s: reset the CPU\n", __func__);
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cpu_reset(env);
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#endif
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} |
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break;
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case PPC970_INPUT_SRESET:
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LOG_IRQ("%s: set the RESET IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_RESET, level); |
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break;
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case PPC970_INPUT_TBEN:
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LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
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level); |
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/* XXX: TODO */
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break;
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default:
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/* Unknown pin - do nothing */
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LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
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return;
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} |
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if (level)
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env->irq_input_state |= 1 << pin;
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else
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env->irq_input_state &= ~(1 << pin);
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} |
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} |
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void ppc970_irq_init (CPUState *env)
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{ |
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env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env,
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PPC970_INPUT_NB); |
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} |
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#endif /* defined(TARGET_PPC64) */ |
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/* PowerPC 40x internal IRQ controller */
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static void ppc40x_set_irq (void *opaque, int pin, int level) |
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{ |
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CPUState *env = opaque; |
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int cur_level;
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LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
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env, pin, level); |
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cur_level = (env->irq_input_state >> pin) & 1;
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/* Don't generate spurious events */
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if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { |
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switch (pin) {
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case PPC40x_INPUT_RESET_SYS:
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if (level) {
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LOG_IRQ("%s: reset the PowerPC system\n",
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__func__); |
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ppc40x_system_reset(env); |
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} |
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break;
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case PPC40x_INPUT_RESET_CHIP:
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if (level) {
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LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
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ppc40x_chip_reset(env); |
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} |
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break;
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case PPC40x_INPUT_RESET_CORE:
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/* XXX: TODO: update DBSR[MRR] */
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if (level) {
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LOG_IRQ("%s: reset the PowerPC core\n", __func__);
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ppc40x_core_reset(env); |
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} |
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break;
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case PPC40x_INPUT_CINT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the critical IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_CEXT, level); |
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break;
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case PPC40x_INPUT_INT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the external IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
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break;
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case PPC40x_INPUT_HALT:
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/* Level sensitive - active low */
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if (level) {
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LOG_IRQ("%s: stop the CPU\n", __func__);
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env->halted = 1;
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} else {
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LOG_IRQ("%s: restart the CPU\n", __func__);
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env->halted = 0;
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} |
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break;
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case PPC40x_INPUT_DEBUG:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the debug pin state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level); |
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break;
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default:
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/* Unknown pin - do nothing */
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LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
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return;
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} |
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if (level)
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env->irq_input_state |= 1 << pin;
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else
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env->irq_input_state &= ~(1 << pin);
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} |
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} |
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void ppc40x_irq_init (CPUState *env)
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{ |
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env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
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env, PPC40x_INPUT_NB); |
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} |
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/* PowerPC E500 internal IRQ controller */
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static void ppce500_set_irq (void *opaque, int pin, int level) |
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{ |
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CPUState *env = opaque; |
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int cur_level;
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LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
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env, pin, level); |
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cur_level = (env->irq_input_state >> pin) & 1;
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/* Don't generate spurious events */
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if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { |
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switch (pin) {
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case PPCE500_INPUT_MCK:
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if (level) {
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LOG_IRQ("%s: reset the PowerPC system\n",
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__func__); |
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qemu_system_reset_request(); |
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} |
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break;
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case PPCE500_INPUT_RESET_CORE:
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if (level) {
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LOG_IRQ("%s: reset the PowerPC core\n", __func__);
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ppc_set_irq(env, PPC_INTERRUPT_MCK, level); |
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} |
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break;
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case PPCE500_INPUT_CINT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the critical IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_CEXT, level); |
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break;
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case PPCE500_INPUT_INT:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the core IRQ state to %d\n",
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__func__, level); |
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ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
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break;
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case PPCE500_INPUT_DEBUG:
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/* Level sensitive - active high */
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LOG_IRQ("%s: set the debug pin state to %d\n",
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__func__, level); |
359 |
ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level); |
360 |
break;
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default:
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/* Unknown pin - do nothing */
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LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
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364 |
return;
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} |
366 |
if (level)
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env->irq_input_state |= 1 << pin;
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else
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env->irq_input_state &= ~(1 << pin);
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} |
371 |
} |
372 |
|
373 |
void ppce500_irq_init (CPUState *env)
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374 |
{ |
375 |
env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
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env, PPCE500_INPUT_NB); |
377 |
} |
378 |
/*****************************************************************************/
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/* PowerPC time base and decrementer emulation */
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struct ppc_tb_t {
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381 |
/* Time base management */
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382 |
int64_t tb_offset; /* Compensation */
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int64_t atb_offset; /* Compensation */
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384 |
uint32_t tb_freq; /* TB frequency */
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385 |
/* Decrementer management */
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386 |
uint64_t decr_next; /* Tick for next decr interrupt */
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387 |
uint32_t decr_freq; /* decrementer frequency */
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388 |
struct QEMUTimer *decr_timer;
|
389 |
/* Hypervisor decrementer management */
|
390 |
uint64_t hdecr_next; /* Tick for next hdecr interrupt */
|
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struct QEMUTimer *hdecr_timer;
|
392 |
uint64_t purr_load; |
393 |
uint64_t purr_start; |
394 |
void *opaque;
|
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}; |
396 |
|
397 |
static inline uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk, |
398 |
int64_t tb_offset) |
399 |
{ |
400 |
/* TB time in tb periods */
|
401 |
return muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()) + tb_offset;
|
402 |
} |
403 |
|
404 |
uint32_t cpu_ppc_load_tbl (CPUState *env) |
405 |
{ |
406 |
ppc_tb_t *tb_env = env->tb_env; |
407 |
uint64_t tb; |
408 |
|
409 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
410 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
411 |
|
412 |
return tb & 0xFFFFFFFF; |
413 |
} |
414 |
|
415 |
static inline uint32_t _cpu_ppc_load_tbu(CPUState *env) |
416 |
{ |
417 |
ppc_tb_t *tb_env = env->tb_env; |
418 |
uint64_t tb; |
419 |
|
420 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
421 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
422 |
|
423 |
return tb >> 32; |
424 |
} |
425 |
|
426 |
uint32_t cpu_ppc_load_tbu (CPUState *env) |
427 |
{ |
428 |
return _cpu_ppc_load_tbu(env);
|
429 |
} |
430 |
|
431 |
static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk, |
432 |
int64_t *tb_offsetp, uint64_t value) |
433 |
{ |
434 |
*tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()); |
435 |
LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n", |
436 |
__func__, value, *tb_offsetp); |
437 |
} |
438 |
|
439 |
void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
|
440 |
{ |
441 |
ppc_tb_t *tb_env = env->tb_env; |
442 |
uint64_t tb; |
443 |
|
444 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
445 |
tb &= 0xFFFFFFFF00000000ULL;
|
446 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
447 |
&tb_env->tb_offset, tb | (uint64_t)value); |
448 |
} |
449 |
|
450 |
static inline void _cpu_ppc_store_tbu(CPUState *env, uint32_t value) |
451 |
{ |
452 |
ppc_tb_t *tb_env = env->tb_env; |
453 |
uint64_t tb; |
454 |
|
455 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
456 |
tb &= 0x00000000FFFFFFFFULL;
|
457 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
458 |
&tb_env->tb_offset, ((uint64_t)value << 32) | tb);
|
459 |
} |
460 |
|
461 |
void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
|
462 |
{ |
463 |
_cpu_ppc_store_tbu(env, value); |
464 |
} |
465 |
|
466 |
uint32_t cpu_ppc_load_atbl (CPUState *env) |
467 |
{ |
468 |
ppc_tb_t *tb_env = env->tb_env; |
469 |
uint64_t tb; |
470 |
|
471 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
472 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
473 |
|
474 |
return tb & 0xFFFFFFFF; |
475 |
} |
476 |
|
477 |
uint32_t cpu_ppc_load_atbu (CPUState *env) |
478 |
{ |
479 |
ppc_tb_t *tb_env = env->tb_env; |
480 |
uint64_t tb; |
481 |
|
482 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
483 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
484 |
|
485 |
return tb >> 32; |
486 |
} |
487 |
|
488 |
void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
|
489 |
{ |
490 |
ppc_tb_t *tb_env = env->tb_env; |
491 |
uint64_t tb; |
492 |
|
493 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
494 |
tb &= 0xFFFFFFFF00000000ULL;
|
495 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
496 |
&tb_env->atb_offset, tb | (uint64_t)value); |
497 |
} |
498 |
|
499 |
void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
|
500 |
{ |
501 |
ppc_tb_t *tb_env = env->tb_env; |
502 |
uint64_t tb; |
503 |
|
504 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
505 |
tb &= 0x00000000FFFFFFFFULL;
|
506 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
507 |
&tb_env->atb_offset, ((uint64_t)value << 32) | tb);
|
508 |
} |
509 |
|
510 |
static void cpu_ppc_tb_stop (CPUState *env) |
511 |
{ |
512 |
ppc_tb_t *tb_env = env->tb_env; |
513 |
uint64_t tb, atb, vmclk; |
514 |
|
515 |
/* If the time base is already frozen, do nothing */
|
516 |
if (tb_env->tb_freq != 0) { |
517 |
vmclk = qemu_get_clock(vm_clock); |
518 |
/* Get the time base */
|
519 |
tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset); |
520 |
/* Get the alternate time base */
|
521 |
atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset); |
522 |
/* Store the time base value (ie compute the current offset) */
|
523 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); |
524 |
/* Store the alternate time base value (compute the current offset) */
|
525 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); |
526 |
/* Set the time base frequency to zero */
|
527 |
tb_env->tb_freq = 0;
|
528 |
/* Now, the time bases are frozen to tb_offset / atb_offset value */
|
529 |
} |
530 |
} |
531 |
|
532 |
static void cpu_ppc_tb_start (CPUState *env) |
533 |
{ |
534 |
ppc_tb_t *tb_env = env->tb_env; |
535 |
uint64_t tb, atb, vmclk; |
536 |
|
537 |
/* If the time base is not frozen, do nothing */
|
538 |
if (tb_env->tb_freq == 0) { |
539 |
vmclk = qemu_get_clock(vm_clock); |
540 |
/* Get the time base from tb_offset */
|
541 |
tb = tb_env->tb_offset; |
542 |
/* Get the alternate time base from atb_offset */
|
543 |
atb = tb_env->atb_offset; |
544 |
/* Restore the tb frequency from the decrementer frequency */
|
545 |
tb_env->tb_freq = tb_env->decr_freq; |
546 |
/* Store the time base value */
|
547 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); |
548 |
/* Store the alternate time base value */
|
549 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); |
550 |
} |
551 |
} |
552 |
|
553 |
static inline uint32_t _cpu_ppc_load_decr(CPUState *env, uint64_t next) |
554 |
{ |
555 |
ppc_tb_t *tb_env = env->tb_env; |
556 |
uint32_t decr; |
557 |
int64_t diff; |
558 |
|
559 |
diff = next - qemu_get_clock(vm_clock); |
560 |
if (diff >= 0) |
561 |
decr = muldiv64(diff, tb_env->decr_freq, get_ticks_per_sec()); |
562 |
else
|
563 |
decr = -muldiv64(-diff, tb_env->decr_freq, get_ticks_per_sec()); |
564 |
LOG_TB("%s: %08" PRIx32 "\n", __func__, decr); |
565 |
|
566 |
return decr;
|
567 |
} |
568 |
|
569 |
uint32_t cpu_ppc_load_decr (CPUState *env) |
570 |
{ |
571 |
ppc_tb_t *tb_env = env->tb_env; |
572 |
|
573 |
return _cpu_ppc_load_decr(env, tb_env->decr_next);
|
574 |
} |
575 |
|
576 |
uint32_t cpu_ppc_load_hdecr (CPUState *env) |
577 |
{ |
578 |
ppc_tb_t *tb_env = env->tb_env; |
579 |
|
580 |
return _cpu_ppc_load_decr(env, tb_env->hdecr_next);
|
581 |
} |
582 |
|
583 |
uint64_t cpu_ppc_load_purr (CPUState *env) |
584 |
{ |
585 |
ppc_tb_t *tb_env = env->tb_env; |
586 |
uint64_t diff; |
587 |
|
588 |
diff = qemu_get_clock(vm_clock) - tb_env->purr_start; |
589 |
|
590 |
return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, get_ticks_per_sec());
|
591 |
} |
592 |
|
593 |
/* When decrementer expires,
|
594 |
* all we need to do is generate or queue a CPU exception
|
595 |
*/
|
596 |
static inline void cpu_ppc_decr_excp(CPUState *env) |
597 |
{ |
598 |
/* Raise it */
|
599 |
LOG_TB("raise decrementer exception\n");
|
600 |
ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
|
601 |
} |
602 |
|
603 |
static inline void cpu_ppc_hdecr_excp(CPUState *env) |
604 |
{ |
605 |
/* Raise it */
|
606 |
LOG_TB("raise decrementer exception\n");
|
607 |
ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1);
|
608 |
} |
609 |
|
610 |
static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp, |
611 |
struct QEMUTimer *timer,
|
612 |
void (*raise_excp)(CPUState *),
|
613 |
uint32_t decr, uint32_t value, |
614 |
int is_excp)
|
615 |
{ |
616 |
ppc_tb_t *tb_env = env->tb_env; |
617 |
uint64_t now, next; |
618 |
|
619 |
LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__, |
620 |
decr, value); |
621 |
now = qemu_get_clock(vm_clock); |
622 |
next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq); |
623 |
if (is_excp)
|
624 |
next += *nextp - now; |
625 |
if (next == now)
|
626 |
next++; |
627 |
*nextp = next; |
628 |
/* Adjust timer */
|
629 |
qemu_mod_timer(timer, next); |
630 |
/* If we set a negative value and the decrementer was positive,
|
631 |
* raise an exception.
|
632 |
*/
|
633 |
if ((value & 0x80000000) && !(decr & 0x80000000)) |
634 |
(*raise_excp)(env); |
635 |
} |
636 |
|
637 |
static inline void _cpu_ppc_store_decr(CPUState *env, uint32_t decr, |
638 |
uint32_t value, int is_excp)
|
639 |
{ |
640 |
ppc_tb_t *tb_env = env->tb_env; |
641 |
|
642 |
__cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer, |
643 |
&cpu_ppc_decr_excp, decr, value, is_excp); |
644 |
} |
645 |
|
646 |
void cpu_ppc_store_decr (CPUState *env, uint32_t value)
|
647 |
{ |
648 |
_cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
|
649 |
} |
650 |
|
651 |
static void cpu_ppc_decr_cb (void *opaque) |
652 |
{ |
653 |
_cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1); |
654 |
} |
655 |
|
656 |
static inline void _cpu_ppc_store_hdecr(CPUState *env, uint32_t hdecr, |
657 |
uint32_t value, int is_excp)
|
658 |
{ |
659 |
ppc_tb_t *tb_env = env->tb_env; |
660 |
|
661 |
if (tb_env->hdecr_timer != NULL) { |
662 |
__cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer, |
663 |
&cpu_ppc_hdecr_excp, hdecr, value, is_excp); |
664 |
} |
665 |
} |
666 |
|
667 |
void cpu_ppc_store_hdecr (CPUState *env, uint32_t value)
|
668 |
{ |
669 |
_cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0);
|
670 |
} |
671 |
|
672 |
static void cpu_ppc_hdecr_cb (void *opaque) |
673 |
{ |
674 |
_cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1); |
675 |
} |
676 |
|
677 |
void cpu_ppc_store_purr (CPUState *env, uint64_t value)
|
678 |
{ |
679 |
ppc_tb_t *tb_env = env->tb_env; |
680 |
|
681 |
tb_env->purr_load = value; |
682 |
tb_env->purr_start = qemu_get_clock(vm_clock); |
683 |
} |
684 |
|
685 |
static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq) |
686 |
{ |
687 |
CPUState *env = opaque; |
688 |
ppc_tb_t *tb_env = env->tb_env; |
689 |
|
690 |
tb_env->tb_freq = freq; |
691 |
tb_env->decr_freq = freq; |
692 |
/* There is a bug in Linux 2.4 kernels:
|
693 |
* if a decrementer exception is pending when it enables msr_ee at startup,
|
694 |
* it's not ready to handle it...
|
695 |
*/
|
696 |
_cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
697 |
_cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
698 |
cpu_ppc_store_purr(env, 0x0000000000000000ULL);
|
699 |
} |
700 |
|
701 |
/* Set up (once) timebase frequency (in Hz) */
|
702 |
clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq) |
703 |
{ |
704 |
ppc_tb_t *tb_env; |
705 |
|
706 |
tb_env = qemu_mallocz(sizeof(ppc_tb_t));
|
707 |
env->tb_env = tb_env; |
708 |
/* Create new timer */
|
709 |
tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env); |
710 |
if (0) { |
711 |
/* XXX: find a suitable condition to enable the hypervisor decrementer
|
712 |
*/
|
713 |
tb_env->hdecr_timer = qemu_new_timer(vm_clock, &cpu_ppc_hdecr_cb, env); |
714 |
} else {
|
715 |
tb_env->hdecr_timer = NULL;
|
716 |
} |
717 |
cpu_ppc_set_tb_clk(env, freq); |
718 |
|
719 |
return &cpu_ppc_set_tb_clk;
|
720 |
} |
721 |
|
722 |
/* Specific helpers for POWER & PowerPC 601 RTC */
|
723 |
#if 0
|
724 |
static clk_setup_cb cpu_ppc601_rtc_init (CPUState *env)
|
725 |
{
|
726 |
return cpu_ppc_tb_init(env, 7812500);
|
727 |
}
|
728 |
#endif
|
729 |
|
730 |
void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
|
731 |
{ |
732 |
_cpu_ppc_store_tbu(env, value); |
733 |
} |
734 |
|
735 |
uint32_t cpu_ppc601_load_rtcu (CPUState *env) |
736 |
{ |
737 |
return _cpu_ppc_load_tbu(env);
|
738 |
} |
739 |
|
740 |
void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
|
741 |
{ |
742 |
cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
|
743 |
} |
744 |
|
745 |
uint32_t cpu_ppc601_load_rtcl (CPUState *env) |
746 |
{ |
747 |
return cpu_ppc_load_tbl(env) & 0x3FFFFF80; |
748 |
} |
749 |
|
750 |
/*****************************************************************************/
|
751 |
/* Embedded PowerPC timers */
|
752 |
|
753 |
/* PIT, FIT & WDT */
|
754 |
typedef struct ppcemb_timer_t ppcemb_timer_t; |
755 |
struct ppcemb_timer_t {
|
756 |
uint64_t pit_reload; /* PIT auto-reload value */
|
757 |
uint64_t fit_next; /* Tick for next FIT interrupt */
|
758 |
struct QEMUTimer *fit_timer;
|
759 |
uint64_t wdt_next; /* Tick for next WDT interrupt */
|
760 |
struct QEMUTimer *wdt_timer;
|
761 |
}; |
762 |
|
763 |
/* Fixed interval timer */
|
764 |
static void cpu_4xx_fit_cb (void *opaque) |
765 |
{ |
766 |
CPUState *env; |
767 |
ppc_tb_t *tb_env; |
768 |
ppcemb_timer_t *ppcemb_timer; |
769 |
uint64_t now, next; |
770 |
|
771 |
env = opaque; |
772 |
tb_env = env->tb_env; |
773 |
ppcemb_timer = tb_env->opaque; |
774 |
now = qemu_get_clock(vm_clock); |
775 |
switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) { |
776 |
case 0: |
777 |
next = 1 << 9; |
778 |
break;
|
779 |
case 1: |
780 |
next = 1 << 13; |
781 |
break;
|
782 |
case 2: |
783 |
next = 1 << 17; |
784 |
break;
|
785 |
case 3: |
786 |
next = 1 << 21; |
787 |
break;
|
788 |
default:
|
789 |
/* Cannot occur, but makes gcc happy */
|
790 |
return;
|
791 |
} |
792 |
next = now + muldiv64(next, get_ticks_per_sec(), tb_env->tb_freq); |
793 |
if (next == now)
|
794 |
next++; |
795 |
qemu_mod_timer(ppcemb_timer->fit_timer, next); |
796 |
env->spr[SPR_40x_TSR] |= 1 << 26; |
797 |
if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) |
798 |
ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
|
799 |
LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, |
800 |
(int)((env->spr[SPR_40x_TCR] >> 23) & 0x1), |
801 |
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); |
802 |
} |
803 |
|
804 |
/* Programmable interval timer */
|
805 |
static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp) |
806 |
{ |
807 |
ppcemb_timer_t *ppcemb_timer; |
808 |
uint64_t now, next; |
809 |
|
810 |
ppcemb_timer = tb_env->opaque; |
811 |
if (ppcemb_timer->pit_reload <= 1 || |
812 |
!((env->spr[SPR_40x_TCR] >> 26) & 0x1) || |
813 |
(is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) { |
814 |
/* Stop PIT */
|
815 |
LOG_TB("%s: stop PIT\n", __func__);
|
816 |
qemu_del_timer(tb_env->decr_timer); |
817 |
} else {
|
818 |
LOG_TB("%s: start PIT %016" PRIx64 "\n", |
819 |
__func__, ppcemb_timer->pit_reload); |
820 |
now = qemu_get_clock(vm_clock); |
821 |
next = now + muldiv64(ppcemb_timer->pit_reload, |
822 |
get_ticks_per_sec(), tb_env->decr_freq); |
823 |
if (is_excp)
|
824 |
next += tb_env->decr_next - now; |
825 |
if (next == now)
|
826 |
next++; |
827 |
qemu_mod_timer(tb_env->decr_timer, next); |
828 |
tb_env->decr_next = next; |
829 |
} |
830 |
} |
831 |
|
832 |
static void cpu_4xx_pit_cb (void *opaque) |
833 |
{ |
834 |
CPUState *env; |
835 |
ppc_tb_t *tb_env; |
836 |
ppcemb_timer_t *ppcemb_timer; |
837 |
|
838 |
env = opaque; |
839 |
tb_env = env->tb_env; |
840 |
ppcemb_timer = tb_env->opaque; |
841 |
env->spr[SPR_40x_TSR] |= 1 << 27; |
842 |
if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) |
843 |
ppc_set_irq(env, PPC_INTERRUPT_PIT, 1);
|
844 |
start_stop_pit(env, tb_env, 1);
|
845 |
LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " " |
846 |
"%016" PRIx64 "\n", __func__, |
847 |
(int)((env->spr[SPR_40x_TCR] >> 22) & 0x1), |
848 |
(int)((env->spr[SPR_40x_TCR] >> 26) & 0x1), |
849 |
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR], |
850 |
ppcemb_timer->pit_reload); |
851 |
} |
852 |
|
853 |
/* Watchdog timer */
|
854 |
static void cpu_4xx_wdt_cb (void *opaque) |
855 |
{ |
856 |
CPUState *env; |
857 |
ppc_tb_t *tb_env; |
858 |
ppcemb_timer_t *ppcemb_timer; |
859 |
uint64_t now, next; |
860 |
|
861 |
env = opaque; |
862 |
tb_env = env->tb_env; |
863 |
ppcemb_timer = tb_env->opaque; |
864 |
now = qemu_get_clock(vm_clock); |
865 |
switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) { |
866 |
case 0: |
867 |
next = 1 << 17; |
868 |
break;
|
869 |
case 1: |
870 |
next = 1 << 21; |
871 |
break;
|
872 |
case 2: |
873 |
next = 1 << 25; |
874 |
break;
|
875 |
case 3: |
876 |
next = 1 << 29; |
877 |
break;
|
878 |
default:
|
879 |
/* Cannot occur, but makes gcc happy */
|
880 |
return;
|
881 |
} |
882 |
next = now + muldiv64(next, get_ticks_per_sec(), tb_env->decr_freq); |
883 |
if (next == now)
|
884 |
next++; |
885 |
LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, |
886 |
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); |
887 |
switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) { |
888 |
case 0x0: |
889 |
case 0x1: |
890 |
qemu_mod_timer(ppcemb_timer->wdt_timer, next); |
891 |
ppcemb_timer->wdt_next = next; |
892 |
env->spr[SPR_40x_TSR] |= 1 << 31; |
893 |
break;
|
894 |
case 0x2: |
895 |
qemu_mod_timer(ppcemb_timer->wdt_timer, next); |
896 |
ppcemb_timer->wdt_next = next; |
897 |
env->spr[SPR_40x_TSR] |= 1 << 30; |
898 |
if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) |
899 |
ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
|
900 |
break;
|
901 |
case 0x3: |
902 |
env->spr[SPR_40x_TSR] &= ~0x30000000;
|
903 |
env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
|
904 |
switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) { |
905 |
case 0x0: |
906 |
/* No reset */
|
907 |
break;
|
908 |
case 0x1: /* Core reset */ |
909 |
ppc40x_core_reset(env); |
910 |
break;
|
911 |
case 0x2: /* Chip reset */ |
912 |
ppc40x_chip_reset(env); |
913 |
break;
|
914 |
case 0x3: /* System reset */ |
915 |
ppc40x_system_reset(env); |
916 |
break;
|
917 |
} |
918 |
} |
919 |
} |
920 |
|
921 |
void store_40x_pit (CPUState *env, target_ulong val)
|
922 |
{ |
923 |
ppc_tb_t *tb_env; |
924 |
ppcemb_timer_t *ppcemb_timer; |
925 |
|
926 |
tb_env = env->tb_env; |
927 |
ppcemb_timer = tb_env->opaque; |
928 |
LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val); |
929 |
ppcemb_timer->pit_reload = val; |
930 |
start_stop_pit(env, tb_env, 0);
|
931 |
} |
932 |
|
933 |
target_ulong load_40x_pit (CPUState *env) |
934 |
{ |
935 |
return cpu_ppc_load_decr(env);
|
936 |
} |
937 |
|
938 |
void store_booke_tsr (CPUState *env, target_ulong val)
|
939 |
{ |
940 |
LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val); |
941 |
env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000);
|
942 |
if (val & 0x80000000) |
943 |
ppc_set_irq(env, PPC_INTERRUPT_PIT, 0);
|
944 |
} |
945 |
|
946 |
void store_booke_tcr (CPUState *env, target_ulong val)
|
947 |
{ |
948 |
ppc_tb_t *tb_env; |
949 |
|
950 |
tb_env = env->tb_env; |
951 |
LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val); |
952 |
env->spr[SPR_40x_TCR] = val & 0xFFC00000;
|
953 |
start_stop_pit(env, tb_env, 1);
|
954 |
cpu_4xx_wdt_cb(env); |
955 |
} |
956 |
|
957 |
static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq) |
958 |
{ |
959 |
CPUState *env = opaque; |
960 |
ppc_tb_t *tb_env = env->tb_env; |
961 |
|
962 |
LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__, |
963 |
freq); |
964 |
tb_env->tb_freq = freq; |
965 |
tb_env->decr_freq = freq; |
966 |
/* XXX: we should also update all timers */
|
967 |
} |
968 |
|
969 |
clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq) |
970 |
{ |
971 |
ppc_tb_t *tb_env; |
972 |
ppcemb_timer_t *ppcemb_timer; |
973 |
|
974 |
tb_env = qemu_mallocz(sizeof(ppc_tb_t));
|
975 |
env->tb_env = tb_env; |
976 |
ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
|
977 |
tb_env->tb_freq = freq; |
978 |
tb_env->decr_freq = freq; |
979 |
tb_env->opaque = ppcemb_timer; |
980 |
LOG_TB("%s freq %" PRIu32 "\n", __func__, freq); |
981 |
if (ppcemb_timer != NULL) { |
982 |
/* We use decr timer for PIT */
|
983 |
tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env); |
984 |
ppcemb_timer->fit_timer = |
985 |
qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env); |
986 |
ppcemb_timer->wdt_timer = |
987 |
qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env); |
988 |
} |
989 |
|
990 |
return &ppc_emb_set_tb_clk;
|
991 |
} |
992 |
|
993 |
/*****************************************************************************/
|
994 |
/* Embedded PowerPC Device Control Registers */
|
995 |
typedef struct ppc_dcrn_t ppc_dcrn_t; |
996 |
struct ppc_dcrn_t {
|
997 |
dcr_read_cb dcr_read; |
998 |
dcr_write_cb dcr_write; |
999 |
void *opaque;
|
1000 |
}; |
1001 |
|
1002 |
/* XXX: on 460, DCR addresses are 32 bits wide,
|
1003 |
* using DCRIPR to get the 22 upper bits of the DCR address
|
1004 |
*/
|
1005 |
#define DCRN_NB 1024 |
1006 |
struct ppc_dcr_t {
|
1007 |
ppc_dcrn_t dcrn[DCRN_NB]; |
1008 |
int (*read_error)(int dcrn); |
1009 |
int (*write_error)(int dcrn); |
1010 |
}; |
1011 |
|
1012 |
int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp) |
1013 |
{ |
1014 |
ppc_dcrn_t *dcr; |
1015 |
|
1016 |
if (dcrn < 0 || dcrn >= DCRN_NB) |
1017 |
goto error;
|
1018 |
dcr = &dcr_env->dcrn[dcrn]; |
1019 |
if (dcr->dcr_read == NULL) |
1020 |
goto error;
|
1021 |
*valp = (*dcr->dcr_read)(dcr->opaque, dcrn); |
1022 |
|
1023 |
return 0; |
1024 |
|
1025 |
error:
|
1026 |
if (dcr_env->read_error != NULL) |
1027 |
return (*dcr_env->read_error)(dcrn);
|
1028 |
|
1029 |
return -1; |
1030 |
} |
1031 |
|
1032 |
int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val) |
1033 |
{ |
1034 |
ppc_dcrn_t *dcr; |
1035 |
|
1036 |
if (dcrn < 0 || dcrn >= DCRN_NB) |
1037 |
goto error;
|
1038 |
dcr = &dcr_env->dcrn[dcrn]; |
1039 |
if (dcr->dcr_write == NULL) |
1040 |
goto error;
|
1041 |
(*dcr->dcr_write)(dcr->opaque, dcrn, val); |
1042 |
|
1043 |
return 0; |
1044 |
|
1045 |
error:
|
1046 |
if (dcr_env->write_error != NULL) |
1047 |
return (*dcr_env->write_error)(dcrn);
|
1048 |
|
1049 |
return -1; |
1050 |
} |
1051 |
|
1052 |
int ppc_dcr_register (CPUState *env, int dcrn, void *opaque, |
1053 |
dcr_read_cb dcr_read, dcr_write_cb dcr_write) |
1054 |
{ |
1055 |
ppc_dcr_t *dcr_env; |
1056 |
ppc_dcrn_t *dcr; |
1057 |
|
1058 |
dcr_env = env->dcr_env; |
1059 |
if (dcr_env == NULL) |
1060 |
return -1; |
1061 |
if (dcrn < 0 || dcrn >= DCRN_NB) |
1062 |
return -1; |
1063 |
dcr = &dcr_env->dcrn[dcrn]; |
1064 |
if (dcr->opaque != NULL || |
1065 |
dcr->dcr_read != NULL ||
|
1066 |
dcr->dcr_write != NULL)
|
1067 |
return -1; |
1068 |
dcr->opaque = opaque; |
1069 |
dcr->dcr_read = dcr_read; |
1070 |
dcr->dcr_write = dcr_write; |
1071 |
|
1072 |
return 0; |
1073 |
} |
1074 |
|
1075 |
int ppc_dcr_init (CPUState *env, int (*read_error)(int dcrn), |
1076 |
int (*write_error)(int dcrn)) |
1077 |
{ |
1078 |
ppc_dcr_t *dcr_env; |
1079 |
|
1080 |
dcr_env = qemu_mallocz(sizeof(ppc_dcr_t));
|
1081 |
dcr_env->read_error = read_error; |
1082 |
dcr_env->write_error = write_error; |
1083 |
env->dcr_env = dcr_env; |
1084 |
|
1085 |
return 0; |
1086 |
} |
1087 |
|
1088 |
#if 0
|
1089 |
/*****************************************************************************/
|
1090 |
/* Handle system reset (for now, just stop emulation) */
|
1091 |
void cpu_reset(CPUState *env)
|
1092 |
{
|
1093 |
printf("Reset asked... Stop emulation\n");
|
1094 |
abort();
|
1095 |
}
|
1096 |
#endif
|
1097 |
|
1098 |
/*****************************************************************************/
|
1099 |
/* Debug port */
|
1100 |
void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val) |
1101 |
{ |
1102 |
addr &= 0xF;
|
1103 |
switch (addr) {
|
1104 |
case 0: |
1105 |
printf("%c", val);
|
1106 |
break;
|
1107 |
case 1: |
1108 |
printf("\n");
|
1109 |
fflush(stdout); |
1110 |
break;
|
1111 |
case 2: |
1112 |
printf("Set loglevel to %04" PRIx32 "\n", val); |
1113 |
cpu_set_log(val | 0x100);
|
1114 |
break;
|
1115 |
} |
1116 |
} |
1117 |
|
1118 |
/*****************************************************************************/
|
1119 |
/* NVRAM helpers */
|
1120 |
static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr) |
1121 |
{ |
1122 |
return (*nvram->read_fn)(nvram->opaque, addr);;
|
1123 |
} |
1124 |
|
1125 |
static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val) |
1126 |
{ |
1127 |
(*nvram->write_fn)(nvram->opaque, addr, val); |
1128 |
} |
1129 |
|
1130 |
void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value)
|
1131 |
{ |
1132 |
nvram_write(nvram, addr, value); |
1133 |
} |
1134 |
|
1135 |
uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr) |
1136 |
{ |
1137 |
return nvram_read(nvram, addr);
|
1138 |
} |
1139 |
|
1140 |
void NVRAM_set_word (nvram_t *nvram, uint32_t addr, uint16_t value)
|
1141 |
{ |
1142 |
nvram_write(nvram, addr, value >> 8);
|
1143 |
nvram_write(nvram, addr + 1, value & 0xFF); |
1144 |
} |
1145 |
|
1146 |
uint16_t NVRAM_get_word (nvram_t *nvram, uint32_t addr) |
1147 |
{ |
1148 |
uint16_t tmp; |
1149 |
|
1150 |
tmp = nvram_read(nvram, addr) << 8;
|
1151 |
tmp |= nvram_read(nvram, addr + 1);
|
1152 |
|
1153 |
return tmp;
|
1154 |
} |
1155 |
|
1156 |
void NVRAM_set_lword (nvram_t *nvram, uint32_t addr, uint32_t value)
|
1157 |
{ |
1158 |
nvram_write(nvram, addr, value >> 24);
|
1159 |
nvram_write(nvram, addr + 1, (value >> 16) & 0xFF); |
1160 |
nvram_write(nvram, addr + 2, (value >> 8) & 0xFF); |
1161 |
nvram_write(nvram, addr + 3, value & 0xFF); |
1162 |
} |
1163 |
|
1164 |
uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr) |
1165 |
{ |
1166 |
uint32_t tmp; |
1167 |
|
1168 |
tmp = nvram_read(nvram, addr) << 24;
|
1169 |
tmp |= nvram_read(nvram, addr + 1) << 16; |
1170 |
tmp |= nvram_read(nvram, addr + 2) << 8; |
1171 |
tmp |= nvram_read(nvram, addr + 3);
|
1172 |
|
1173 |
return tmp;
|
1174 |
} |
1175 |
|
1176 |
void NVRAM_set_string (nvram_t *nvram, uint32_t addr,
|
1177 |
const char *str, uint32_t max) |
1178 |
{ |
1179 |
int i;
|
1180 |
|
1181 |
for (i = 0; i < max && str[i] != '\0'; i++) { |
1182 |
nvram_write(nvram, addr + i, str[i]); |
1183 |
} |
1184 |
nvram_write(nvram, addr + i, str[i]); |
1185 |
nvram_write(nvram, addr + max - 1, '\0'); |
1186 |
} |
1187 |
|
1188 |
int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max) |
1189 |
{ |
1190 |
int i;
|
1191 |
|
1192 |
memset(dst, 0, max);
|
1193 |
for (i = 0; i < max; i++) { |
1194 |
dst[i] = NVRAM_get_byte(nvram, addr + i); |
1195 |
if (dst[i] == '\0') |
1196 |
break;
|
1197 |
} |
1198 |
|
1199 |
return i;
|
1200 |
} |
1201 |
|
1202 |
static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
|
1203 |
{ |
1204 |
uint16_t tmp; |
1205 |
uint16_t pd, pd1, pd2; |
1206 |
|
1207 |
tmp = prev >> 8;
|
1208 |
pd = prev ^ value; |
1209 |
pd1 = pd & 0x000F;
|
1210 |
pd2 = ((pd >> 4) & 0x000F) ^ pd1; |
1211 |
tmp ^= (pd1 << 3) | (pd1 << 8); |
1212 |
tmp ^= pd2 | (pd2 << 7) | (pd2 << 12); |
1213 |
|
1214 |
return tmp;
|
1215 |
} |
1216 |
|
1217 |
static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count)
|
1218 |
{ |
1219 |
uint32_t i; |
1220 |
uint16_t crc = 0xFFFF;
|
1221 |
int odd;
|
1222 |
|
1223 |
odd = count & 1;
|
1224 |
count &= ~1;
|
1225 |
for (i = 0; i != count; i++) { |
1226 |
crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i)); |
1227 |
} |
1228 |
if (odd) {
|
1229 |
crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
|
1230 |
} |
1231 |
|
1232 |
return crc;
|
1233 |
} |
1234 |
|
1235 |
#define CMDLINE_ADDR 0x017ff000 |
1236 |
|
1237 |
int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
|
1238 |
const char *arch, |
1239 |
uint32_t RAM_size, int boot_device,
|
1240 |
uint32_t kernel_image, uint32_t kernel_size, |
1241 |
const char *cmdline, |
1242 |
uint32_t initrd_image, uint32_t initrd_size, |
1243 |
uint32_t NVRAM_image, |
1244 |
int width, int height, int depth) |
1245 |
{ |
1246 |
uint16_t crc; |
1247 |
|
1248 |
/* Set parameters for Open Hack'Ware BIOS */
|
1249 |
NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16); |
1250 |
NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */ |
1251 |
NVRAM_set_word(nvram, 0x14, NVRAM_size);
|
1252 |
NVRAM_set_string(nvram, 0x20, arch, 16); |
1253 |
NVRAM_set_lword(nvram, 0x30, RAM_size);
|
1254 |
NVRAM_set_byte(nvram, 0x34, boot_device);
|
1255 |
NVRAM_set_lword(nvram, 0x38, kernel_image);
|
1256 |
NVRAM_set_lword(nvram, 0x3C, kernel_size);
|
1257 |
if (cmdline) {
|
1258 |
/* XXX: put the cmdline in NVRAM too ? */
|
1259 |
pstrcpy_targphys("cmdline", CMDLINE_ADDR, RAM_size - CMDLINE_ADDR, cmdline);
|
1260 |
NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
|
1261 |
NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
|
1262 |
} else {
|
1263 |
NVRAM_set_lword(nvram, 0x40, 0); |
1264 |
NVRAM_set_lword(nvram, 0x44, 0); |
1265 |
} |
1266 |
NVRAM_set_lword(nvram, 0x48, initrd_image);
|
1267 |
NVRAM_set_lword(nvram, 0x4C, initrd_size);
|
1268 |
NVRAM_set_lword(nvram, 0x50, NVRAM_image);
|
1269 |
|
1270 |
NVRAM_set_word(nvram, 0x54, width);
|
1271 |
NVRAM_set_word(nvram, 0x56, height);
|
1272 |
NVRAM_set_word(nvram, 0x58, depth);
|
1273 |
crc = NVRAM_compute_crc(nvram, 0x00, 0xF8); |
1274 |
NVRAM_set_word(nvram, 0xFC, crc);
|
1275 |
|
1276 |
return 0; |
1277 |
} |