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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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//#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_ppc_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); |
340 |
} |
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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); |
358 |
ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level); |
359 |
break;
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360 |
default:
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/* Unknown pin - do nothing */
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362 |
LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
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return;
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364 |
} |
365 |
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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} |
370 |
} |
371 |
|
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void ppce500_irq_init (CPUState *env)
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{ |
374 |
env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
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env, PPCE500_INPUT_NB); |
376 |
} |
377 |
/*****************************************************************************/
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378 |
/* PowerPC time base and decrementer emulation */
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struct ppc_tb_t {
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380 |
/* Time base management */
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381 |
int64_t tb_offset; /* Compensation */
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int64_t atb_offset; /* Compensation */
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uint32_t tb_freq; /* TB frequency */
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384 |
/* Decrementer management */
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385 |
uint64_t decr_next; /* Tick for next decr interrupt */
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386 |
uint32_t decr_freq; /* decrementer frequency */
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387 |
struct QEMUTimer *decr_timer;
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388 |
/* Hypervisor decrementer management */
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389 |
uint64_t hdecr_next; /* Tick for next hdecr interrupt */
|
390 |
struct QEMUTimer *hdecr_timer;
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391 |
uint64_t purr_load; |
392 |
uint64_t purr_start; |
393 |
void *opaque;
|
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}; |
395 |
|
396 |
static inline uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk, |
397 |
int64_t tb_offset) |
398 |
{ |
399 |
/* TB time in tb periods */
|
400 |
return muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()) + tb_offset;
|
401 |
} |
402 |
|
403 |
uint32_t cpu_ppc_load_tbl (CPUState *env) |
404 |
{ |
405 |
ppc_tb_t *tb_env = env->tb_env; |
406 |
uint64_t tb; |
407 |
|
408 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
409 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
410 |
|
411 |
return tb & 0xFFFFFFFF; |
412 |
} |
413 |
|
414 |
static inline uint32_t _cpu_ppc_load_tbu(CPUState *env) |
415 |
{ |
416 |
ppc_tb_t *tb_env = env->tb_env; |
417 |
uint64_t tb; |
418 |
|
419 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
420 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
421 |
|
422 |
return tb >> 32; |
423 |
} |
424 |
|
425 |
uint32_t cpu_ppc_load_tbu (CPUState *env) |
426 |
{ |
427 |
return _cpu_ppc_load_tbu(env);
|
428 |
} |
429 |
|
430 |
static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk, |
431 |
int64_t *tb_offsetp, uint64_t value) |
432 |
{ |
433 |
*tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()); |
434 |
LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n", |
435 |
__func__, value, *tb_offsetp); |
436 |
} |
437 |
|
438 |
void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
|
439 |
{ |
440 |
ppc_tb_t *tb_env = env->tb_env; |
441 |
uint64_t tb; |
442 |
|
443 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
444 |
tb &= 0xFFFFFFFF00000000ULL;
|
445 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
446 |
&tb_env->tb_offset, tb | (uint64_t)value); |
447 |
} |
448 |
|
449 |
static inline void _cpu_ppc_store_tbu(CPUState *env, uint32_t value) |
450 |
{ |
451 |
ppc_tb_t *tb_env = env->tb_env; |
452 |
uint64_t tb; |
453 |
|
454 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
455 |
tb &= 0x00000000FFFFFFFFULL;
|
456 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
457 |
&tb_env->tb_offset, ((uint64_t)value << 32) | tb);
|
458 |
} |
459 |
|
460 |
void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
|
461 |
{ |
462 |
_cpu_ppc_store_tbu(env, value); |
463 |
} |
464 |
|
465 |
uint32_t cpu_ppc_load_atbl (CPUState *env) |
466 |
{ |
467 |
ppc_tb_t *tb_env = env->tb_env; |
468 |
uint64_t tb; |
469 |
|
470 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
471 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
472 |
|
473 |
return tb & 0xFFFFFFFF; |
474 |
} |
475 |
|
476 |
uint32_t cpu_ppc_load_atbu (CPUState *env) |
477 |
{ |
478 |
ppc_tb_t *tb_env = env->tb_env; |
479 |
uint64_t tb; |
480 |
|
481 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
482 |
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); |
483 |
|
484 |
return tb >> 32; |
485 |
} |
486 |
|
487 |
void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
|
488 |
{ |
489 |
ppc_tb_t *tb_env = env->tb_env; |
490 |
uint64_t tb; |
491 |
|
492 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
493 |
tb &= 0xFFFFFFFF00000000ULL;
|
494 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
495 |
&tb_env->atb_offset, tb | (uint64_t)value); |
496 |
} |
497 |
|
498 |
void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
|
499 |
{ |
500 |
ppc_tb_t *tb_env = env->tb_env; |
501 |
uint64_t tb; |
502 |
|
503 |
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
504 |
tb &= 0x00000000FFFFFFFFULL;
|
505 |
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
506 |
&tb_env->atb_offset, ((uint64_t)value << 32) | tb);
|
507 |
} |
508 |
|
509 |
static void cpu_ppc_tb_stop (CPUState *env) |
510 |
{ |
511 |
ppc_tb_t *tb_env = env->tb_env; |
512 |
uint64_t tb, atb, vmclk; |
513 |
|
514 |
/* If the time base is already frozen, do nothing */
|
515 |
if (tb_env->tb_freq != 0) { |
516 |
vmclk = qemu_get_clock(vm_clock); |
517 |
/* Get the time base */
|
518 |
tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset); |
519 |
/* Get the alternate time base */
|
520 |
atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset); |
521 |
/* Store the time base value (ie compute the current offset) */
|
522 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); |
523 |
/* Store the alternate time base value (compute the current offset) */
|
524 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); |
525 |
/* Set the time base frequency to zero */
|
526 |
tb_env->tb_freq = 0;
|
527 |
/* Now, the time bases are frozen to tb_offset / atb_offset value */
|
528 |
} |
529 |
} |
530 |
|
531 |
static void cpu_ppc_tb_start (CPUState *env) |
532 |
{ |
533 |
ppc_tb_t *tb_env = env->tb_env; |
534 |
uint64_t tb, atb, vmclk; |
535 |
|
536 |
/* If the time base is not frozen, do nothing */
|
537 |
if (tb_env->tb_freq == 0) { |
538 |
vmclk = qemu_get_clock(vm_clock); |
539 |
/* Get the time base from tb_offset */
|
540 |
tb = tb_env->tb_offset; |
541 |
/* Get the alternate time base from atb_offset */
|
542 |
atb = tb_env->atb_offset; |
543 |
/* Restore the tb frequency from the decrementer frequency */
|
544 |
tb_env->tb_freq = tb_env->decr_freq; |
545 |
/* Store the time base value */
|
546 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); |
547 |
/* Store the alternate time base value */
|
548 |
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); |
549 |
} |
550 |
} |
551 |
|
552 |
static inline uint32_t _cpu_ppc_load_decr(CPUState *env, uint64_t next) |
553 |
{ |
554 |
ppc_tb_t *tb_env = env->tb_env; |
555 |
uint32_t decr; |
556 |
int64_t diff; |
557 |
|
558 |
diff = next - qemu_get_clock(vm_clock); |
559 |
if (diff >= 0) |
560 |
decr = muldiv64(diff, tb_env->decr_freq, get_ticks_per_sec()); |
561 |
else
|
562 |
decr = -muldiv64(-diff, tb_env->decr_freq, get_ticks_per_sec()); |
563 |
LOG_TB("%s: %08" PRIx32 "\n", __func__, decr); |
564 |
|
565 |
return decr;
|
566 |
} |
567 |
|
568 |
uint32_t cpu_ppc_load_decr (CPUState *env) |
569 |
{ |
570 |
ppc_tb_t *tb_env = env->tb_env; |
571 |
|
572 |
return _cpu_ppc_load_decr(env, tb_env->decr_next);
|
573 |
} |
574 |
|
575 |
uint32_t cpu_ppc_load_hdecr (CPUState *env) |
576 |
{ |
577 |
ppc_tb_t *tb_env = env->tb_env; |
578 |
|
579 |
return _cpu_ppc_load_decr(env, tb_env->hdecr_next);
|
580 |
} |
581 |
|
582 |
uint64_t cpu_ppc_load_purr (CPUState *env) |
583 |
{ |
584 |
ppc_tb_t *tb_env = env->tb_env; |
585 |
uint64_t diff; |
586 |
|
587 |
diff = qemu_get_clock(vm_clock) - tb_env->purr_start; |
588 |
|
589 |
return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, get_ticks_per_sec());
|
590 |
} |
591 |
|
592 |
/* When decrementer expires,
|
593 |
* all we need to do is generate or queue a CPU exception
|
594 |
*/
|
595 |
static inline void cpu_ppc_decr_excp(CPUState *env) |
596 |
{ |
597 |
/* Raise it */
|
598 |
LOG_TB("raise decrementer exception\n");
|
599 |
ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
|
600 |
} |
601 |
|
602 |
static inline void cpu_ppc_hdecr_excp(CPUState *env) |
603 |
{ |
604 |
/* Raise it */
|
605 |
LOG_TB("raise decrementer exception\n");
|
606 |
ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1);
|
607 |
} |
608 |
|
609 |
static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp, |
610 |
struct QEMUTimer *timer,
|
611 |
void (*raise_excp)(CPUState *),
|
612 |
uint32_t decr, uint32_t value, |
613 |
int is_excp)
|
614 |
{ |
615 |
ppc_tb_t *tb_env = env->tb_env; |
616 |
uint64_t now, next; |
617 |
|
618 |
LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__, |
619 |
decr, value); |
620 |
now = qemu_get_clock(vm_clock); |
621 |
next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq); |
622 |
if (is_excp)
|
623 |
next += *nextp - now; |
624 |
if (next == now)
|
625 |
next++; |
626 |
*nextp = next; |
627 |
/* Adjust timer */
|
628 |
qemu_mod_timer(timer, next); |
629 |
/* If we set a negative value and the decrementer was positive,
|
630 |
* raise an exception.
|
631 |
*/
|
632 |
if ((value & 0x80000000) && !(decr & 0x80000000)) |
633 |
(*raise_excp)(env); |
634 |
} |
635 |
|
636 |
static inline void _cpu_ppc_store_decr(CPUState *env, uint32_t decr, |
637 |
uint32_t value, int is_excp)
|
638 |
{ |
639 |
ppc_tb_t *tb_env = env->tb_env; |
640 |
|
641 |
__cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer, |
642 |
&cpu_ppc_decr_excp, decr, value, is_excp); |
643 |
} |
644 |
|
645 |
void cpu_ppc_store_decr (CPUState *env, uint32_t value)
|
646 |
{ |
647 |
_cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
|
648 |
} |
649 |
|
650 |
static void cpu_ppc_decr_cb (void *opaque) |
651 |
{ |
652 |
_cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1); |
653 |
} |
654 |
|
655 |
static inline void _cpu_ppc_store_hdecr(CPUState *env, uint32_t hdecr, |
656 |
uint32_t value, int is_excp)
|
657 |
{ |
658 |
ppc_tb_t *tb_env = env->tb_env; |
659 |
|
660 |
if (tb_env->hdecr_timer != NULL) { |
661 |
__cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer, |
662 |
&cpu_ppc_hdecr_excp, hdecr, value, is_excp); |
663 |
} |
664 |
} |
665 |
|
666 |
void cpu_ppc_store_hdecr (CPUState *env, uint32_t value)
|
667 |
{ |
668 |
_cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0);
|
669 |
} |
670 |
|
671 |
static void cpu_ppc_hdecr_cb (void *opaque) |
672 |
{ |
673 |
_cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1); |
674 |
} |
675 |
|
676 |
void cpu_ppc_store_purr (CPUState *env, uint64_t value)
|
677 |
{ |
678 |
ppc_tb_t *tb_env = env->tb_env; |
679 |
|
680 |
tb_env->purr_load = value; |
681 |
tb_env->purr_start = qemu_get_clock(vm_clock); |
682 |
} |
683 |
|
684 |
static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq) |
685 |
{ |
686 |
CPUState *env = opaque; |
687 |
ppc_tb_t *tb_env = env->tb_env; |
688 |
|
689 |
tb_env->tb_freq = freq; |
690 |
tb_env->decr_freq = freq; |
691 |
/* There is a bug in Linux 2.4 kernels:
|
692 |
* if a decrementer exception is pending when it enables msr_ee at startup,
|
693 |
* it's not ready to handle it...
|
694 |
*/
|
695 |
_cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
696 |
_cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
697 |
cpu_ppc_store_purr(env, 0x0000000000000000ULL);
|
698 |
} |
699 |
|
700 |
/* Set up (once) timebase frequency (in Hz) */
|
701 |
clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq) |
702 |
{ |
703 |
ppc_tb_t *tb_env; |
704 |
|
705 |
tb_env = qemu_mallocz(sizeof(ppc_tb_t));
|
706 |
env->tb_env = tb_env; |
707 |
/* Create new timer */
|
708 |
tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env); |
709 |
if (0) { |
710 |
/* XXX: find a suitable condition to enable the hypervisor decrementer
|
711 |
*/
|
712 |
tb_env->hdecr_timer = qemu_new_timer(vm_clock, &cpu_ppc_hdecr_cb, env); |
713 |
} else {
|
714 |
tb_env->hdecr_timer = NULL;
|
715 |
} |
716 |
cpu_ppc_set_tb_clk(env, freq); |
717 |
|
718 |
return &cpu_ppc_set_tb_clk;
|
719 |
} |
720 |
|
721 |
/* Specific helpers for POWER & PowerPC 601 RTC */
|
722 |
#if 0
|
723 |
static clk_setup_cb cpu_ppc601_rtc_init (CPUState *env)
|
724 |
{
|
725 |
return cpu_ppc_tb_init(env, 7812500);
|
726 |
}
|
727 |
#endif
|
728 |
|
729 |
void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
|
730 |
{ |
731 |
_cpu_ppc_store_tbu(env, value); |
732 |
} |
733 |
|
734 |
uint32_t cpu_ppc601_load_rtcu (CPUState *env) |
735 |
{ |
736 |
return _cpu_ppc_load_tbu(env);
|
737 |
} |
738 |
|
739 |
void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
|
740 |
{ |
741 |
cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
|
742 |
} |
743 |
|
744 |
uint32_t cpu_ppc601_load_rtcl (CPUState *env) |
745 |
{ |
746 |
return cpu_ppc_load_tbl(env) & 0x3FFFFF80; |
747 |
} |
748 |
|
749 |
/*****************************************************************************/
|
750 |
/* Embedded PowerPC timers */
|
751 |
|
752 |
/* PIT, FIT & WDT */
|
753 |
typedef struct ppcemb_timer_t ppcemb_timer_t; |
754 |
struct ppcemb_timer_t {
|
755 |
uint64_t pit_reload; /* PIT auto-reload value */
|
756 |
uint64_t fit_next; /* Tick for next FIT interrupt */
|
757 |
struct QEMUTimer *fit_timer;
|
758 |
uint64_t wdt_next; /* Tick for next WDT interrupt */
|
759 |
struct QEMUTimer *wdt_timer;
|
760 |
}; |
761 |
|
762 |
/* Fixed interval timer */
|
763 |
static void cpu_4xx_fit_cb (void *opaque) |
764 |
{ |
765 |
CPUState *env; |
766 |
ppc_tb_t *tb_env; |
767 |
ppcemb_timer_t *ppcemb_timer; |
768 |
uint64_t now, next; |
769 |
|
770 |
env = opaque; |
771 |
tb_env = env->tb_env; |
772 |
ppcemb_timer = tb_env->opaque; |
773 |
now = qemu_get_clock(vm_clock); |
774 |
switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) { |
775 |
case 0: |
776 |
next = 1 << 9; |
777 |
break;
|
778 |
case 1: |
779 |
next = 1 << 13; |
780 |
break;
|
781 |
case 2: |
782 |
next = 1 << 17; |
783 |
break;
|
784 |
case 3: |
785 |
next = 1 << 21; |
786 |
break;
|
787 |
default:
|
788 |
/* Cannot occur, but makes gcc happy */
|
789 |
return;
|
790 |
} |
791 |
next = now + muldiv64(next, get_ticks_per_sec(), tb_env->tb_freq); |
792 |
if (next == now)
|
793 |
next++; |
794 |
qemu_mod_timer(ppcemb_timer->fit_timer, next); |
795 |
env->spr[SPR_40x_TSR] |= 1 << 26; |
796 |
if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) |
797 |
ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
|
798 |
LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, |
799 |
(int)((env->spr[SPR_40x_TCR] >> 23) & 0x1), |
800 |
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); |
801 |
} |
802 |
|
803 |
/* Programmable interval timer */
|
804 |
static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp) |
805 |
{ |
806 |
ppcemb_timer_t *ppcemb_timer; |
807 |
uint64_t now, next; |
808 |
|
809 |
ppcemb_timer = tb_env->opaque; |
810 |
if (ppcemb_timer->pit_reload <= 1 || |
811 |
!((env->spr[SPR_40x_TCR] >> 26) & 0x1) || |
812 |
(is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) { |
813 |
/* Stop PIT */
|
814 |
LOG_TB("%s: stop PIT\n", __func__);
|
815 |
qemu_del_timer(tb_env->decr_timer); |
816 |
} else {
|
817 |
LOG_TB("%s: start PIT %016" PRIx64 "\n", |
818 |
__func__, ppcemb_timer->pit_reload); |
819 |
now = qemu_get_clock(vm_clock); |
820 |
next = now + muldiv64(ppcemb_timer->pit_reload, |
821 |
get_ticks_per_sec(), tb_env->decr_freq); |
822 |
if (is_excp)
|
823 |
next += tb_env->decr_next - now; |
824 |
if (next == now)
|
825 |
next++; |
826 |
qemu_mod_timer(tb_env->decr_timer, next); |
827 |
tb_env->decr_next = next; |
828 |
} |
829 |
} |
830 |
|
831 |
static void cpu_4xx_pit_cb (void *opaque) |
832 |
{ |
833 |
CPUState *env; |
834 |
ppc_tb_t *tb_env; |
835 |
ppcemb_timer_t *ppcemb_timer; |
836 |
|
837 |
env = opaque; |
838 |
tb_env = env->tb_env; |
839 |
ppcemb_timer = tb_env->opaque; |
840 |
env->spr[SPR_40x_TSR] |= 1 << 27; |
841 |
if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) |
842 |
ppc_set_irq(env, PPC_INTERRUPT_PIT, 1);
|
843 |
start_stop_pit(env, tb_env, 1);
|
844 |
LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " " |
845 |
"%016" PRIx64 "\n", __func__, |
846 |
(int)((env->spr[SPR_40x_TCR] >> 22) & 0x1), |
847 |
(int)((env->spr[SPR_40x_TCR] >> 26) & 0x1), |
848 |
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR], |
849 |
ppcemb_timer->pit_reload); |
850 |
} |
851 |
|
852 |
/* Watchdog timer */
|
853 |
static void cpu_4xx_wdt_cb (void *opaque) |
854 |
{ |
855 |
CPUState *env; |
856 |
ppc_tb_t *tb_env; |
857 |
ppcemb_timer_t *ppcemb_timer; |
858 |
uint64_t now, next; |
859 |
|
860 |
env = opaque; |
861 |
tb_env = env->tb_env; |
862 |
ppcemb_timer = tb_env->opaque; |
863 |
now = qemu_get_clock(vm_clock); |
864 |
switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) { |
865 |
case 0: |
866 |
next = 1 << 17; |
867 |
break;
|
868 |
case 1: |
869 |
next = 1 << 21; |
870 |
break;
|
871 |
case 2: |
872 |
next = 1 << 25; |
873 |
break;
|
874 |
case 3: |
875 |
next = 1 << 29; |
876 |
break;
|
877 |
default:
|
878 |
/* Cannot occur, but makes gcc happy */
|
879 |
return;
|
880 |
} |
881 |
next = now + muldiv64(next, get_ticks_per_sec(), tb_env->decr_freq); |
882 |
if (next == now)
|
883 |
next++; |
884 |
LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, |
885 |
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); |
886 |
switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) { |
887 |
case 0x0: |
888 |
case 0x1: |
889 |
qemu_mod_timer(ppcemb_timer->wdt_timer, next); |
890 |
ppcemb_timer->wdt_next = next; |
891 |
env->spr[SPR_40x_TSR] |= 1 << 31; |
892 |
break;
|
893 |
case 0x2: |
894 |
qemu_mod_timer(ppcemb_timer->wdt_timer, next); |
895 |
ppcemb_timer->wdt_next = next; |
896 |
env->spr[SPR_40x_TSR] |= 1 << 30; |
897 |
if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) |
898 |
ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
|
899 |
break;
|
900 |
case 0x3: |
901 |
env->spr[SPR_40x_TSR] &= ~0x30000000;
|
902 |
env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
|
903 |
switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) { |
904 |
case 0x0: |
905 |
/* No reset */
|
906 |
break;
|
907 |
case 0x1: /* Core reset */ |
908 |
ppc40x_core_reset(env); |
909 |
break;
|
910 |
case 0x2: /* Chip reset */ |
911 |
ppc40x_chip_reset(env); |
912 |
break;
|
913 |
case 0x3: /* System reset */ |
914 |
ppc40x_system_reset(env); |
915 |
break;
|
916 |
} |
917 |
} |
918 |
} |
919 |
|
920 |
void store_40x_pit (CPUState *env, target_ulong val)
|
921 |
{ |
922 |
ppc_tb_t *tb_env; |
923 |
ppcemb_timer_t *ppcemb_timer; |
924 |
|
925 |
tb_env = env->tb_env; |
926 |
ppcemb_timer = tb_env->opaque; |
927 |
LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val); |
928 |
ppcemb_timer->pit_reload = val; |
929 |
start_stop_pit(env, tb_env, 0);
|
930 |
} |
931 |
|
932 |
target_ulong load_40x_pit (CPUState *env) |
933 |
{ |
934 |
return cpu_ppc_load_decr(env);
|
935 |
} |
936 |
|
937 |
void store_booke_tsr (CPUState *env, target_ulong val)
|
938 |
{ |
939 |
LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val); |
940 |
env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000);
|
941 |
if (val & 0x80000000) |
942 |
ppc_set_irq(env, PPC_INTERRUPT_PIT, 0);
|
943 |
} |
944 |
|
945 |
void store_booke_tcr (CPUState *env, target_ulong val)
|
946 |
{ |
947 |
ppc_tb_t *tb_env; |
948 |
|
949 |
tb_env = env->tb_env; |
950 |
LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val); |
951 |
env->spr[SPR_40x_TCR] = val & 0xFFC00000;
|
952 |
start_stop_pit(env, tb_env, 1);
|
953 |
cpu_4xx_wdt_cb(env); |
954 |
} |
955 |
|
956 |
static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq) |
957 |
{ |
958 |
CPUState *env = opaque; |
959 |
ppc_tb_t *tb_env = env->tb_env; |
960 |
|
961 |
LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__, |
962 |
freq); |
963 |
tb_env->tb_freq = freq; |
964 |
tb_env->decr_freq = freq; |
965 |
/* XXX: we should also update all timers */
|
966 |
} |
967 |
|
968 |
clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq) |
969 |
{ |
970 |
ppc_tb_t *tb_env; |
971 |
ppcemb_timer_t *ppcemb_timer; |
972 |
|
973 |
tb_env = qemu_mallocz(sizeof(ppc_tb_t));
|
974 |
env->tb_env = tb_env; |
975 |
ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
|
976 |
tb_env->tb_freq = freq; |
977 |
tb_env->decr_freq = freq; |
978 |
tb_env->opaque = ppcemb_timer; |
979 |
LOG_TB("%s freq %" PRIu32 "\n", __func__, freq); |
980 |
if (ppcemb_timer != NULL) { |
981 |
/* We use decr timer for PIT */
|
982 |
tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env); |
983 |
ppcemb_timer->fit_timer = |
984 |
qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env); |
985 |
ppcemb_timer->wdt_timer = |
986 |
qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env); |
987 |
} |
988 |
|
989 |
return &ppc_emb_set_tb_clk;
|
990 |
} |
991 |
|
992 |
/*****************************************************************************/
|
993 |
/* Embedded PowerPC Device Control Registers */
|
994 |
typedef struct ppc_dcrn_t ppc_dcrn_t; |
995 |
struct ppc_dcrn_t {
|
996 |
dcr_read_cb dcr_read; |
997 |
dcr_write_cb dcr_write; |
998 |
void *opaque;
|
999 |
}; |
1000 |
|
1001 |
/* XXX: on 460, DCR addresses are 32 bits wide,
|
1002 |
* using DCRIPR to get the 22 upper bits of the DCR address
|
1003 |
*/
|
1004 |
#define DCRN_NB 1024 |
1005 |
struct ppc_dcr_t {
|
1006 |
ppc_dcrn_t dcrn[DCRN_NB]; |
1007 |
int (*read_error)(int dcrn); |
1008 |
int (*write_error)(int dcrn); |
1009 |
}; |
1010 |
|
1011 |
int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp) |
1012 |
{ |
1013 |
ppc_dcrn_t *dcr; |
1014 |
|
1015 |
if (dcrn < 0 || dcrn >= DCRN_NB) |
1016 |
goto error;
|
1017 |
dcr = &dcr_env->dcrn[dcrn]; |
1018 |
if (dcr->dcr_read == NULL) |
1019 |
goto error;
|
1020 |
*valp = (*dcr->dcr_read)(dcr->opaque, dcrn); |
1021 |
|
1022 |
return 0; |
1023 |
|
1024 |
error:
|
1025 |
if (dcr_env->read_error != NULL) |
1026 |
return (*dcr_env->read_error)(dcrn);
|
1027 |
|
1028 |
return -1; |
1029 |
} |
1030 |
|
1031 |
int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val) |
1032 |
{ |
1033 |
ppc_dcrn_t *dcr; |
1034 |
|
1035 |
if (dcrn < 0 || dcrn >= DCRN_NB) |
1036 |
goto error;
|
1037 |
dcr = &dcr_env->dcrn[dcrn]; |
1038 |
if (dcr->dcr_write == NULL) |
1039 |
goto error;
|
1040 |
(*dcr->dcr_write)(dcr->opaque, dcrn, val); |
1041 |
|
1042 |
return 0; |
1043 |
|
1044 |
error:
|
1045 |
if (dcr_env->write_error != NULL) |
1046 |
return (*dcr_env->write_error)(dcrn);
|
1047 |
|
1048 |
return -1; |
1049 |
} |
1050 |
|
1051 |
int ppc_dcr_register (CPUState *env, int dcrn, void *opaque, |
1052 |
dcr_read_cb dcr_read, dcr_write_cb dcr_write) |
1053 |
{ |
1054 |
ppc_dcr_t *dcr_env; |
1055 |
ppc_dcrn_t *dcr; |
1056 |
|
1057 |
dcr_env = env->dcr_env; |
1058 |
if (dcr_env == NULL) |
1059 |
return -1; |
1060 |
if (dcrn < 0 || dcrn >= DCRN_NB) |
1061 |
return -1; |
1062 |
dcr = &dcr_env->dcrn[dcrn]; |
1063 |
if (dcr->opaque != NULL || |
1064 |
dcr->dcr_read != NULL ||
|
1065 |
dcr->dcr_write != NULL)
|
1066 |
return -1; |
1067 |
dcr->opaque = opaque; |
1068 |
dcr->dcr_read = dcr_read; |
1069 |
dcr->dcr_write = dcr_write; |
1070 |
|
1071 |
return 0; |
1072 |
} |
1073 |
|
1074 |
int ppc_dcr_init (CPUState *env, int (*read_error)(int dcrn), |
1075 |
int (*write_error)(int dcrn)) |
1076 |
{ |
1077 |
ppc_dcr_t *dcr_env; |
1078 |
|
1079 |
dcr_env = qemu_mallocz(sizeof(ppc_dcr_t));
|
1080 |
dcr_env->read_error = read_error; |
1081 |
dcr_env->write_error = write_error; |
1082 |
env->dcr_env = dcr_env; |
1083 |
|
1084 |
return 0; |
1085 |
} |
1086 |
|
1087 |
#if 0
|
1088 |
/*****************************************************************************/
|
1089 |
/* Handle system reset (for now, just stop emulation) */
|
1090 |
void cpu_ppc_reset (CPUState *env)
|
1091 |
{
|
1092 |
printf("Reset asked... Stop emulation\n");
|
1093 |
abort();
|
1094 |
}
|
1095 |
#endif
|
1096 |
|
1097 |
/*****************************************************************************/
|
1098 |
/* Debug port */
|
1099 |
void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val) |
1100 |
{ |
1101 |
addr &= 0xF;
|
1102 |
switch (addr) {
|
1103 |
case 0: |
1104 |
printf("%c", val);
|
1105 |
break;
|
1106 |
case 1: |
1107 |
printf("\n");
|
1108 |
fflush(stdout); |
1109 |
break;
|
1110 |
case 2: |
1111 |
printf("Set loglevel to %04" PRIx32 "\n", val); |
1112 |
cpu_set_log(val | 0x100);
|
1113 |
break;
|
1114 |
} |
1115 |
} |
1116 |
|
1117 |
/*****************************************************************************/
|
1118 |
/* NVRAM helpers */
|
1119 |
static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr) |
1120 |
{ |
1121 |
return (*nvram->read_fn)(nvram->opaque, addr);;
|
1122 |
} |
1123 |
|
1124 |
static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val) |
1125 |
{ |
1126 |
(*nvram->write_fn)(nvram->opaque, addr, val); |
1127 |
} |
1128 |
|
1129 |
void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value)
|
1130 |
{ |
1131 |
nvram_write(nvram, addr, value); |
1132 |
} |
1133 |
|
1134 |
uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr) |
1135 |
{ |
1136 |
return nvram_read(nvram, addr);
|
1137 |
} |
1138 |
|
1139 |
void NVRAM_set_word (nvram_t *nvram, uint32_t addr, uint16_t value)
|
1140 |
{ |
1141 |
nvram_write(nvram, addr, value >> 8);
|
1142 |
nvram_write(nvram, addr + 1, value & 0xFF); |
1143 |
} |
1144 |
|
1145 |
uint16_t NVRAM_get_word (nvram_t *nvram, uint32_t addr) |
1146 |
{ |
1147 |
uint16_t tmp; |
1148 |
|
1149 |
tmp = nvram_read(nvram, addr) << 8;
|
1150 |
tmp |= nvram_read(nvram, addr + 1);
|
1151 |
|
1152 |
return tmp;
|
1153 |
} |
1154 |
|
1155 |
void NVRAM_set_lword (nvram_t *nvram, uint32_t addr, uint32_t value)
|
1156 |
{ |
1157 |
nvram_write(nvram, addr, value >> 24);
|
1158 |
nvram_write(nvram, addr + 1, (value >> 16) & 0xFF); |
1159 |
nvram_write(nvram, addr + 2, (value >> 8) & 0xFF); |
1160 |
nvram_write(nvram, addr + 3, value & 0xFF); |
1161 |
} |
1162 |
|
1163 |
uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr) |
1164 |
{ |
1165 |
uint32_t tmp; |
1166 |
|
1167 |
tmp = nvram_read(nvram, addr) << 24;
|
1168 |
tmp |= nvram_read(nvram, addr + 1) << 16; |
1169 |
tmp |= nvram_read(nvram, addr + 2) << 8; |
1170 |
tmp |= nvram_read(nvram, addr + 3);
|
1171 |
|
1172 |
return tmp;
|
1173 |
} |
1174 |
|
1175 |
void NVRAM_set_string (nvram_t *nvram, uint32_t addr,
|
1176 |
const char *str, uint32_t max) |
1177 |
{ |
1178 |
int i;
|
1179 |
|
1180 |
for (i = 0; i < max && str[i] != '\0'; i++) { |
1181 |
nvram_write(nvram, addr + i, str[i]); |
1182 |
} |
1183 |
nvram_write(nvram, addr + i, str[i]); |
1184 |
nvram_write(nvram, addr + max - 1, '\0'); |
1185 |
} |
1186 |
|
1187 |
int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max) |
1188 |
{ |
1189 |
int i;
|
1190 |
|
1191 |
memset(dst, 0, max);
|
1192 |
for (i = 0; i < max; i++) { |
1193 |
dst[i] = NVRAM_get_byte(nvram, addr + i); |
1194 |
if (dst[i] == '\0') |
1195 |
break;
|
1196 |
} |
1197 |
|
1198 |
return i;
|
1199 |
} |
1200 |
|
1201 |
static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
|
1202 |
{ |
1203 |
uint16_t tmp; |
1204 |
uint16_t pd, pd1, pd2; |
1205 |
|
1206 |
tmp = prev >> 8;
|
1207 |
pd = prev ^ value; |
1208 |
pd1 = pd & 0x000F;
|
1209 |
pd2 = ((pd >> 4) & 0x000F) ^ pd1; |
1210 |
tmp ^= (pd1 << 3) | (pd1 << 8); |
1211 |
tmp ^= pd2 | (pd2 << 7) | (pd2 << 12); |
1212 |
|
1213 |
return tmp;
|
1214 |
} |
1215 |
|
1216 |
static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count)
|
1217 |
{ |
1218 |
uint32_t i; |
1219 |
uint16_t crc = 0xFFFF;
|
1220 |
int odd;
|
1221 |
|
1222 |
odd = count & 1;
|
1223 |
count &= ~1;
|
1224 |
for (i = 0; i != count; i++) { |
1225 |
crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i)); |
1226 |
} |
1227 |
if (odd) {
|
1228 |
crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
|
1229 |
} |
1230 |
|
1231 |
return crc;
|
1232 |
} |
1233 |
|
1234 |
#define CMDLINE_ADDR 0x017ff000 |
1235 |
|
1236 |
int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
|
1237 |
const char *arch, |
1238 |
uint32_t RAM_size, int boot_device,
|
1239 |
uint32_t kernel_image, uint32_t kernel_size, |
1240 |
const char *cmdline, |
1241 |
uint32_t initrd_image, uint32_t initrd_size, |
1242 |
uint32_t NVRAM_image, |
1243 |
int width, int height, int depth) |
1244 |
{ |
1245 |
uint16_t crc; |
1246 |
|
1247 |
/* Set parameters for Open Hack'Ware BIOS */
|
1248 |
NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16); |
1249 |
NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */ |
1250 |
NVRAM_set_word(nvram, 0x14, NVRAM_size);
|
1251 |
NVRAM_set_string(nvram, 0x20, arch, 16); |
1252 |
NVRAM_set_lword(nvram, 0x30, RAM_size);
|
1253 |
NVRAM_set_byte(nvram, 0x34, boot_device);
|
1254 |
NVRAM_set_lword(nvram, 0x38, kernel_image);
|
1255 |
NVRAM_set_lword(nvram, 0x3C, kernel_size);
|
1256 |
if (cmdline) {
|
1257 |
/* XXX: put the cmdline in NVRAM too ? */
|
1258 |
pstrcpy_targphys(CMDLINE_ADDR, RAM_size - CMDLINE_ADDR, cmdline); |
1259 |
NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
|
1260 |
NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
|
1261 |
} else {
|
1262 |
NVRAM_set_lword(nvram, 0x40, 0); |
1263 |
NVRAM_set_lword(nvram, 0x44, 0); |
1264 |
} |
1265 |
NVRAM_set_lword(nvram, 0x48, initrd_image);
|
1266 |
NVRAM_set_lword(nvram, 0x4C, initrd_size);
|
1267 |
NVRAM_set_lword(nvram, 0x50, NVRAM_image);
|
1268 |
|
1269 |
NVRAM_set_word(nvram, 0x54, width);
|
1270 |
NVRAM_set_word(nvram, 0x56, height);
|
1271 |
NVRAM_set_word(nvram, 0x58, depth);
|
1272 |
crc = NVRAM_compute_crc(nvram, 0x00, 0xF8); |
1273 |
NVRAM_set_word(nvram, 0xFC, crc);
|
1274 |
|
1275 |
return 0; |
1276 |
} |