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/* |
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* PearPC |
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* ppc_cpu.cc |
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* |
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* Copyright (C) 2003 Sebastian Biallas (sb@biallas.net) |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include <cerrno> |
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#include <cstring> |
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|
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#include "debug/tracers.h" |
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#include "system/sys.h" |
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#include "system/sysclk.h" |
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#include "system/systhread.h" |
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#include "system/systimer.h" |
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#include "ppc_cpu.h" |
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#include "ppc_dec.h" |
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#include "ppc_mmu.h" |
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#include "jitc.h" |
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#include "jitc_asm.h" |
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#include "jitc_debug.h" |
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|
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PPC_CPU_State gCPU; |
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bool gSinglestep = false; |
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uint32 gBreakpoint; |
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uint32 gBreakpoint2; |
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|
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extern "C" void ppc_display_jitc_stats() |
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{ |
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ht_printf("pg.dest: write: %qd out of pages: %qd out of tc: %qd\r", &gJITC.destroy_write, &gJITC.destroy_oopages, &gJITC.destroy_ootc); |
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} |
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|
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void ppc_fpu_test(); |
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|
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uint64 gJITCCompileTicks; |
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uint64 gJITCRunTicks; |
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uint64 gJITCRunTicksStart; |
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|
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uint64 gClientClockFrequency; |
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uint64 gClientBusFrequency; |
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uint64 gClientTimeBaseFrequency; |
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uint64 gStartHostCLKTicks; |
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uint64 gTBreadITB; |
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int gHostClockScale; |
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|
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uint64 ppc_get_cpu_ideal_timebase() |
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{ |
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uint64 ticks = sys_get_hiresclk_ticks(); |
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if (gHostClockScale < 0) { |
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// negative shift count -> make it positive |
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return (ticks - gStartHostCLKTicks) >> (-gHostClockScale); |
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} else { |
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return (ticks - gStartHostCLKTicks) << gHostClockScale; |
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} |
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} |
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|
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uint64 ppc_get_cpu_timebase() |
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{ |
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uint64 ticks = sys_get_hiresclk_ticks(); |
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if (gHostClockScale < 0) { |
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gCPU.tb += (ticks - gTBreadITB) >> (-gHostClockScale); |
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} else { |
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gCPU.tb += (ticks - gTBreadITB) << gHostClockScale; |
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} |
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|
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gTBreadITB = ticks; |
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return gCPU.tb; |
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} |
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|
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sys_timer gDECtimer; |
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sys_semaphore gCPUDozeSem; |
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|
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extern "C" void cpu_doze() |
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{ |
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sys_lock_semaphore(gCPUDozeSem); |
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if (!gCPU.exception_pending) sys_wait_semaphore_bounded(gCPUDozeSem, 10); |
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sys_unlock_semaphore(gCPUDozeSem); |
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} |
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|
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void ppc_cpu_wakeup() |
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{ |
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sys_signal_semaphore(gCPUDozeSem); |
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} |
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|
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static void decTimerCB(sys_timer t) |
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{ |
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ppc_cpu_atomic_raise_dec_exception(); |
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// cpu_wakeup(); |
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} |
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|
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void ppc_cpu_run() |
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{ |
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// ppc_fpu_test(); |
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// return; |
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gJITCRunTicks = 0; |
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gJITCCompileTicks = 0; |
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gJITCRunTicksStart = jitcDebugGetTicks(); |
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PPC_CPU_TRACE("execution started at %08x\n", gCPU.pc); |
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jitcDebugInit(); |
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/* |
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PPC_CPU_WARN("clock ticks / second = %08qx\n", q); |
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q = sys_get_cpu_ticks(); |
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PPC_CPU_WARN("ticks = %08qx\n", q); |
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q = sys_get_cpu_ticks(); |
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PPC_CPU_WARN("ticks = %08qx\n", q); |
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q = sys_get_cpu_ticks(); |
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PPC_CPU_WARN("ticks = %08qx\n", q);*/ |
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|
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if (!sys_create_timer(&gDECtimer, decTimerCB)) { |
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ht_printf("Unable to create timer\n"); |
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exit(1); |
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} |
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ppc_start_jitc_asm(gCPU.pc); |
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} |
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|
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void ppc_cpu_map_framebuffer(uint32 pa, uint32 ea) |
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{ |
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// use BAT for framebuffer |
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gCPU.dbatu[0] = ea|(7<<2)|0x3; |
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gCPU.dbatl[0] = pa; |
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|
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gCPU.dbat_bl[0] = (~gCPU.dbatu[0] << 15) & 0xfffe0000; |
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gCPU.dbat_nbl[0] = ~gCPU.dbat_bl[0]; |
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|
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gCPU.dbat_bepi[0] = gCPU.dbatu[0] & gCPU.dbat_bl[0]; |
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gCPU.dbat_brpn[0] = gCPU.dbatl[0] & gCPU.dbat_bl[0]; |
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} |
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|
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|
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void ppc_cpu_stop() |
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{ |
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gCPU.exception_pending = true; |
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gCPU.stop_exception = true; |
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} |
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|
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uint64 ppc_get_clock_frequency(int cpu) |
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{ |
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return gClientClockFrequency; |
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} |
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|
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uint64 ppc_get_bus_frequency(int cpu) |
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{ |
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return gClientBusFrequency; |
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} |
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|
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uint64 ppc_get_timebase_frequency(int cpu) |
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{ |
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return gClientTimeBaseFrequency; |
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} |
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|
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|
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void ppc_machine_check_exception() |
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{ |
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PPC_CPU_ERR("machine check exception\n"); |
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} |
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|
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uint32 ppc_cpu_get_gpr(int cpu, int i) |
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{ |
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return gCPU.gpr[i]; |
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} |
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|
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void ppc_cpu_set_gpr(int cpu, int i, uint32 newvalue) |
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{ |
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gCPU.gpr[i] = newvalue; |
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} |
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|
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void ppc_cpu_set_msr(int cpu, uint32 newvalue) |
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{ |
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gCPU.msr = newvalue; |
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} |
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|
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void ppc_cpu_set_pc(int cpu, uint32 newvalue) |
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{ |
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gCPU.pc = newvalue; |
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} |
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|
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uint32 ppc_cpu_get_pc(int cpu) |
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{ |
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return gCPU.pc_ofs + gCPU.current_code_base; |
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} |
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|
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uint32 ppc_cpu_get_pvr(int cpu) |
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{ |
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return gCPU.pvr; |
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} |
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|
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uint32 ppc_cpu_get_lr(int cpu) |
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{ |
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return gCPU.lr; |
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} |
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|
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|
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void ppc_set_singlestep_v(bool v, const char *file, int line, const char *format, ...) |
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{ |
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va_list arg; |
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va_start(arg, format); |
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ht_fprintf(stdout, "singlestep %s from %s:%d, info: ", v ? "set" : "cleared", file, line); |
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ht_vfprintf(stdout, format, arg); |
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ht_fprintf(stdout, "\n"); |
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va_end(arg); |
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gSinglestep = v; |
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} |
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|
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void ppc_set_singlestep_nonverbose(bool v) |
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{ |
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gSinglestep = v; |
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} |
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|
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#define CPU_KEY_PVR "cpu_pvr" |
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|
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#include "configparser.h" |
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|
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bool ppc_cpu_init() |
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{ |
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memset(&gCPU, 0, sizeof gCPU); |
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gCPU.pvr = gConfig->getConfigInt(CPU_KEY_PVR); |
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|
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ppc_dec_init(); |
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// initialize srs (mostly for prom) |
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for (int i=0; i<16; i++) { |
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gCPU.sr[i] = 0x2aa*i; |
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} |
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|
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gCPU.x87cw = 0x37f; |
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|
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sys_create_semaphore(&gCPUDozeSem); |
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|
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gStartHostCLKTicks = sys_get_hiresclk_ticks(); |
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uint64 q = sys_get_hiresclk_ticks_per_second(); |
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gHostClockScale = 0; |
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while (q < PPC_TIMEBASE_FREQUENCY) { |
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gHostClockScale++; |
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q <<= 1; |
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} |
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while (q > (PPC_TIMEBASE_FREQUENCY*2)) { |
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gHostClockScale--; |
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q >>= 1; |
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} |
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gClientTimeBaseFrequency = q; |
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gClientBusFrequency = gClientTimeBaseFrequency * 4; |
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gClientClockFrequency = gClientBusFrequency * 5; |
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|
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return jitc_init(4096, 32*1024*1024); |
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} |
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|
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void ppc_cpu_init_config() |
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{ |
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gConfig->acceptConfigEntryIntDef("cpu_pvr", 0x000c0201); |
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} |
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