dynamips/trunk/ppc32.c

/*
 * Cisco router simulation platform.
 * Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr)
 *
 * PowerPC (32-bit) generic routines.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <assert.h>

#include "rbtree.h"
#include "cpu.h"
#include "dynamips.h"
#include "memory.h"
#include "device.h"
#include "ppc32_mem.h"
#include "ppc32_exec.h"
#include "ppc32_jit.h"

/* Reset a PowerPC CPU */
int ppc32_reset(cpu_ppc_t *cpu)
{
   cpu->ia = PPC32_ROM_START;
   cpu->gpr[1] = PPC32_ROM_SP;
   cpu->msr = PPC32_MSR_IP;

   /* Restart the MTS subsystem */
   ppc32_mem_restart(cpu);

   /* Flush JIT structures */
   ppc32_jit_flush(cpu,0);
   return(0);
}

/* Initialize a PowerPC processor */
int ppc32_init(cpu_ppc_t *cpu)
{
   /* Initialize idle timer */
   cpu->gen->idle_max = 1500;
   cpu->gen->idle_sleep_time = 30000;

   /* Timer IRQ parameters (default frequency: 250 Hz <=> 4ms period) */
   cpu->timer_irq_check_itv = 1000;
   cpu->timer_irq_freq      = 250;

   /* Idle loop mutex and condition */
   pthread_mutex_init(&cpu->gen->idle_mutex,NULL);
   pthread_cond_init(&cpu->gen->idle_cond,NULL);

   /* Set the CPU methods */
   cpu->gen->reg_set =  (void *)ppc32_reg_set;
   cpu->gen->reg_dump = (void *)ppc32_dump_regs;
   cpu->gen->mmu_dump = (void *)ppc32_dump_mmu;
   cpu->gen->mmu_raw_dump = (void *)ppc32_dump_mmu;
   cpu->gen->add_breakpoint = (void *)ppc32_add_breakpoint;
   cpu->gen->remove_breakpoint = (void *)ppc32_remove_breakpoint;
   cpu->gen->set_idle_pc = (void *)ppc32_set_idle_pc;
   cpu->gen->get_idling_pc = (void *)ppc32_get_idling_pc;

   /* Set the startup parameters */
   ppc32_reset(cpu);
   return(0);
}

/* Delete a PowerPC processor */
void ppc32_delete(cpu_ppc_t *cpu)
{
   if (cpu) {
      ppc32_mem_shutdown(cpu);
      ppc32_jit_shutdown(cpu);
   }
}

/* Set the processor version register (PVR) */
void ppc32_set_pvr(cpu_ppc_t *cpu,m_uint32_t pvr)
{
   cpu->pvr = pvr;
   ppc32_mem_restart(cpu);
}

/* Set idle PC value */
void ppc32_set_idle_pc(cpu_gen_t *cpu,m_uint64_t addr)
{
   CPU_PPC32(cpu)->idle_pc = (m_uint32_t)addr;
}

/* Timer IRQ */
void *ppc32_timer_irq_run(cpu_ppc_t *cpu)
{
   pthread_mutex_t umutex = PTHREAD_MUTEX_INITIALIZER;
   pthread_cond_t ucond = PTHREAD_COND_INITIALIZER;
   struct timespec t_spc;
   m_tmcnt_t expire;
   u_int interval;
   u_int threshold;

#if 0
   while(!cpu->timer_irq_armed)
      sleep(1);
#endif

   interval = 1000000 / cpu->timer_irq_freq;
   threshold = cpu->timer_irq_freq * 10;
   expire = m_gettime_usec() + interval;

   while(cpu->gen->state != CPU_STATE_HALTED) {
      pthread_mutex_lock(&umutex);
      t_spc.tv_sec = expire / 1000000;
      t_spc.tv_nsec = (expire % 1000000) * 1000;
      pthread_cond_timedwait(&ucond,&umutex,&t_spc);
      pthread_mutex_unlock(&umutex);

      if (likely(!cpu->irq_disable) &&
          likely(cpu->gen->state == CPU_STATE_RUNNING) &&
          likely(cpu->msr & PPC32_MSR_EE))
      {
         cpu->timer_irq_pending++;

         if (unlikely(cpu->timer_irq_pending > threshold)) {
            cpu->timer_irq_pending = 0;
            cpu->timer_drift++;
#if 0
            printf("Timer IRQ not accurate (%u pending IRQ): "
                   "reduce the \"--timer-irq-check-itv\" parameter "
                   "(current value: %u)\n",
                   cpu->timer_irq_pending,cpu->timer_irq_check_itv);
#endif
         }
      }

      expire += interval;
   }

   return NULL;
}

#define IDLE_HASH_SIZE  8192

/* Idle PC hash item */
struct ppc32_idle_pc_hash {
   m_uint32_t ia;
   u_int count;
   struct ppc32_idle_pc_hash *next;
};

/* Determine an "idling" PC */
int ppc32_get_idling_pc(cpu_gen_t *cpu)
{
   cpu_ppc_t *pcpu = CPU_PPC32(cpu);
   struct ppc32_idle_pc_hash **pc_hash,*p;
   struct cpu_idle_pc *res;
   u_int h_index,res_count;
   m_uint32_t cur_ia;
   int i;

   cpu->idle_pc_prop_count = 0;

   if (pcpu->idle_pc != 0) {
      printf("\nYou already use an idle PC, using the calibration would give "
             "incorrect results.\n");
      return(-1);
   }

   printf("\nPlease wait while gathering statistics...\n");

   pc_hash = calloc(IDLE_HASH_SIZE,sizeof(struct ppc32_idle_pc_hash *));

   /* Disable IRQ */
   pcpu->irq_disable = TRUE;

   /* Take 1000 measures, each mesure every 10ms */
   for(i=0;i<1000;i++) {
      cur_ia = pcpu->ia;
      h_index = (cur_ia >> 2) & (IDLE_HASH_SIZE-1);

      for(p=pc_hash[h_index];p;p=p->next)
         if (p->ia == cur_ia) {
            p->count++;
            break;
         }

      if (!p) {
         if ((p = malloc(sizeof(*p)))) {
            p->ia    = cur_ia;
            p->count = 1;
            p->next  = pc_hash[h_index];
            pc_hash[h_index] = p;
         }
      }

      usleep(10000);
   }

   /* Select PCs */
   for(i=0,res_count=0;i<IDLE_HASH_SIZE;i++) {
      for(p=pc_hash[i];p;p=p->next)
         if ((p->count >= 20) && (p->count <= 80)) {
            res = &cpu->idle_pc_prop[cpu->idle_pc_prop_count++];

            res->pc    = p->ia;
            res->count = p->count;

            if (cpu->idle_pc_prop_count >= CPU_IDLE_PC_MAX_RES)
               goto done;
         }
   }

 done:
   /* Set idle PC */
   if (cpu->idle_pc_prop_count) {
      printf("Done. Suggested idling PC:\n");

      for(i=0;i<cpu->idle_pc_prop_count;i++) {
         printf("   0x%llx (count=%u)\n",
                cpu->idle_pc_prop[i].pc,
                cpu->idle_pc_prop[i].count);
      }         

      printf("Restart the emulator with \"--idle-pc=0x%llx\" (for example)\n",
             cpu->idle_pc_prop[0].pc);
   } else {
      printf("Done. No suggestion for idling PC\n");
   }

   /* Re-enable IRQ */
   pcpu->irq_disable = FALSE;
   return(0);
}

#if 0
/* Set an IRQ (VM IRQ standard routing) */
void ppc32_vm_set_irq(vm_instance_t *vm,u_int irq)
{
   cpu_ppc_t *boot_cpu;

   boot_cpu = CPU_PPC32(vm->boot_cpu);

   if (boot_cpu->irq_disable) {
      boot_cpu->irq_pending = 0;
      return;
   }

   ppc32_set_irq(boot_cpu,irq);

   if (boot_cpu->irq_idle_preempt[irq])
      cpu_idle_break_wait(vm->boot_cpu);
}

/* Clear an IRQ (VM IRQ standard routing) */
void ppc32_vm_clear_irq(vm_instance_t *vm,u_int irq)
{
   cpu_ppc_t *boot_cpu;

   boot_cpu = CPU_PPC32(vm->boot_cpu);
   ppc32_clear_irq(boot_cpu,irq);
}
#endif

/* Generate an exception */
void ppc32_trigger_exception(cpu_ppc_t *cpu,u_int exc_vector)
{
   //printf("TRIGGER_EXCEPTION: saving cpu->ia=0x%8.8x, msr=0x%8.8x\n",
   //       cpu->ia,cpu->msr);

   /* Save the return instruction address */
   cpu->srr0 = cpu->ia;
   
   if (exc_vector == PPC32_EXC_SYSCALL)
      cpu->srr0 += sizeof(ppc_insn_t);

   //printf("SRR0 = 0x%8.8x\n",cpu->srr0);

   /* Save Machine State Register (MSR) */
   cpu->srr1 = cpu->msr & PPC32_EXC_SRR1_MASK;

   //printf("SRR1 = 0x%8.8x\n",cpu->srr1);

   /* Set the new SRR value */
   cpu->msr &= ~PPC32_EXC_MSR_MASK;
   cpu->irq_check = FALSE;

   //printf("MSR = 0x%8.8x\n",cpu->msr);

   /* Use bootstrap vectors ? */
   if (cpu->msr & PPC32_MSR_IP)
      cpu->ia = 0xFFF00000 + exc_vector;
   else
      cpu->ia = exc_vector;
}

/* Trigger IRQs */
fastcall void ppc32_trigger_irq(cpu_ppc_t *cpu)
{
   if (unlikely(cpu->irq_disable)) {
      cpu->irq_pending = FALSE;
      cpu->irq_check = FALSE;
      return;
   }

   /* Clear the IRQ check flag */
   cpu->irq_check = FALSE;

   if (cpu->irq_pending && (cpu->msr & PPC32_MSR_EE)) {
      cpu->irq_count++;
      cpu->irq_pending = FALSE;
      ppc32_trigger_exception(cpu,PPC32_EXC_EXT);
   }
}

/* Trigger the decrementer exception */
void ppc32_trigger_timer_irq(cpu_ppc_t *cpu)
{
   cpu->timer_irq_count++;

   if (cpu->msr & PPC32_MSR_EE)
      ppc32_trigger_exception(cpu,PPC32_EXC_DEC);
}

/* Virtual breakpoint */
fastcall void ppc32_run_breakpoint(cpu_ppc_t *cpu)
{
   cpu_log(cpu->gen,"BREAKPOINT",
           "Virtual breakpoint reached at IA=0x%8.8x\n",cpu->ia);

   printf("[[[ Virtual Breakpoint reached at IA=0x%8.8x LR=0x%8.8x]]]\n",
          cpu->ia,cpu->lr);

   ppc32_dump_regs(cpu->gen);
}

/* Add a virtual breakpoint */
int ppc32_add_breakpoint(cpu_gen_t *cpu,m_uint64_t ia)
{
   cpu_ppc_t *pcpu = CPU_PPC32(cpu);
   int i;

   for(i=0;i<PPC32_MAX_BREAKPOINTS;i++)
      if (!pcpu->breakpoints[i])
         break;

   if (i == PPC32_MAX_BREAKPOINTS)
      return(-1);

   pcpu->breakpoints[i] = ia;
   pcpu->breakpoints_enabled = TRUE;
   return(0);
}

/* Remove a virtual breakpoint */
void ppc32_remove_breakpoint(cpu_gen_t *cpu,m_uint64_t ia)
{   
   cpu_ppc_t *pcpu = CPU_PPC32(cpu);
   int i,j;

   for(i=0;i<PPC32_MAX_BREAKPOINTS;i++)
      if (pcpu->breakpoints[i] == ia)
      {
         for(j=i;j<PPC32_MAX_BREAKPOINTS-1;j++)
            pcpu->breakpoints[j] = pcpu->breakpoints[j+1];

         pcpu->breakpoints[PPC32_MAX_BREAKPOINTS-1] = 0;
      }

   for(i=0;i<PPC32_MAX_BREAKPOINTS;i++)
      if (pcpu->breakpoints[i] != 0)
         return;

   pcpu->breakpoints_enabled = FALSE;
}

/* Set a register */
void ppc32_reg_set(cpu_gen_t *cpu,u_int reg,m_uint64_t val)
{
   if (reg < PPC32_GPR_NR)
      CPU_PPC32(cpu)->gpr[reg] = (m_uint32_t)val;
}

/* Dump registers of a PowerPC processor */
void ppc32_dump_regs(cpu_gen_t *cpu)
{ 
   cpu_ppc_t *pcpu = CPU_PPC32(cpu);
   int i;
   
   printf("PowerPC Registers:\n");

   for(i=0;i<PPC32_GPR_NR/4;i++) {
      printf("  $%2d = 0x%8.8x  $%2d = 0x%8.8x"
             "  $%2d = 0x%8.8x  $%2d = 0x%8.8x\n",
             i*4, pcpu->gpr[i*4], (i*4)+1, pcpu->gpr[(i*4)+1],
             (i*4)+2, pcpu->gpr[(i*4)+2], (i*4)+3, pcpu->gpr[(i*4)+3]);
   }

   printf("\n");
   printf("  ia = 0x%8.8x, lr = 0x%8.8x\n", pcpu->ia, pcpu->lr);
   printf("  cr = 0x%8.8x, msr = 0x%8.8x, xer = 0x%8.8x, dec = 0x%8.8x\n", 
          pcpu->cr, pcpu->msr, 
          pcpu->xer | (pcpu->xer_ca << PPC32_XER_CA_BIT), 
          pcpu->dec);

   printf("  sprg[0] = 0x%8.8x, sprg[1] = 0x%8.8x\n",
          pcpu->sprg[0],pcpu->sprg[1]);

   printf("  sprg[2] = 0x%8.8x, sprg[3] = 0x%8.8x\n",
          pcpu->sprg[2],pcpu->sprg[3]);

   printf("\n  IRQ count: %llu, IRQ false positives: %llu, "
          "IRQ Pending: %u, IRQ Check: %s\n",
          pcpu->irq_count,pcpu->irq_fp_count,pcpu->irq_pending,
          pcpu->irq_check ? "yes" : "no");

   printf("  Timer IRQ count: %llu, pending: %u, timer drift: %u\n\n",
          pcpu->timer_irq_count,pcpu->timer_irq_pending,pcpu->timer_drift);

   printf("\n");
}

/* Dump BAT registers */
static void ppc32_dump_bat(cpu_ppc_t *cpu,int index)
{
   int i;

   for(i=0;i<PPC32_BAT_NR;i++)
      printf("    BAT[%d] = 0x%8.8x 0x%8.8x\n",
             i,cpu->bat[index][i].reg[0],cpu->bat[index][i].reg[1]);
}

/* Dump MMU registers */
void ppc32_dump_mmu(cpu_gen_t *cpu)
{
   cpu_ppc_t *pcpu = CPU_PPC32(cpu);
   int i;

   printf("PowerPC MMU Registers:\n");

   printf(" - IBAT Registers:\n");
   ppc32_dump_bat(pcpu,PPC32_IBAT_IDX);

   printf(" - DBAT Registers:\n");
   ppc32_dump_bat(pcpu,PPC32_DBAT_IDX);

   printf(" - Segment Registers:\n");
   for(i=0;i<PPC32_SR_NR;i++)
      printf("    SR[%d] = 0x%8.8x\n",i,pcpu->sr[i]);

   printf(" - SDR1: 0x%8.8x\n",pcpu->sdr1);
}

/* Load a raw image into the simulated memory */
int ppc32_load_raw_image(cpu_ppc_t *cpu,char *filename,m_uint32_t vaddr)
{   
   struct stat file_info;
   size_t len,clen;
   m_uint32_t remain;
   void *haddr;
   FILE *bfd;

   if (!(bfd = fopen(filename,"r"))) {
      perror("fopen");
      return(-1);
   }

   if (fstat(fileno(bfd),&file_info) == -1) {
      perror("stat");
      return(-1);
   }

   len = file_info.st_size;

   printf("Loading RAW file '%s' at virtual address 0x%8.8x (size=%lu)\n",
          filename,vaddr,(u_long)len);

   while(len > 0)
   {
      haddr = cpu->mem_op_lookup(cpu,vaddr,PPC32_MTS_DCACHE);
   
      if (!haddr) {
         fprintf(stderr,"load_raw_image: invalid load address 0x%8.8x\n",
                 vaddr);
         return(-1);
      }

      if (len > PPC32_MIN_PAGE_SIZE)
         clen = PPC32_MIN_PAGE_SIZE;
      else
         clen = len;

      remain = MIPS_MIN_PAGE_SIZE;
      remain -= (vaddr - (vaddr & MIPS_MIN_PAGE_MASK));
      
      clen = m_min(clen,remain);

      if (fread((u_char *)haddr,clen,1,bfd) != 1)
         break;
      
      vaddr += clen;
      len -= clen;
   }
   
   fclose(bfd);
   return(0);
}

/* Load an ELF image into the simulated memory */
int ppc32_load_elf_image(cpu_ppc_t *cpu,char *filename,int skip_load,
                         m_uint32_t *entry_point)
{
   m_uint32_t vaddr,remain;
   void *haddr;
   Elf32_Ehdr *ehdr;
   Elf32_Shdr *shdr;
   Elf_Scn *scn;
   Elf *img_elf;
   size_t len,clen;
   char *name;
   int i,fd;
   FILE *bfd;

   if (!filename)
      return(-1);

#ifdef __CYGWIN__
   fd = open(filename,O_RDONLY|O_BINARY);
#else
   fd = open(filename,O_RDONLY);
#endif

   if (fd == -1) {
      perror("load_elf_image: open");
      return(-1);
   }

   if (elf_version(EV_CURRENT) == EV_NONE) {
      fprintf(stderr,"load_elf_image: library out of date\n");
      return(-1);
   }

   if (!(img_elf = elf_begin(fd,ELF_C_READ,NULL))) {
      fprintf(stderr,"load_elf_image: elf_begin: %s\n",
              elf_errmsg(elf_errno()));
      return(-1);
   }

   if (!(ehdr = elf32_getehdr(img_elf))) {
      fprintf(stderr,"load_elf_image: invalid ELF file\n");
      return(-1);
   }

   printf("Loading ELF file '%s'...\n",filename);
   bfd = fdopen(fd,"rb");

   if (!bfd) {
      perror("load_elf_image: fdopen");
      return(-1);
   }

   if (!skip_load) {
      for(i=0;i<ehdr->e_shnum;i++) {
         scn = elf_getscn(img_elf,i);

         shdr = elf32_getshdr(scn);
         name = elf_strptr(img_elf, ehdr->e_shstrndx, (size_t)shdr->sh_name);
         len  = shdr->sh_size;

         if (!(shdr->sh_flags & SHF_ALLOC) || !len)
            continue;

         fseek(bfd,shdr->sh_offset,SEEK_SET);
         vaddr = shdr->sh_addr;

         if (cpu->vm->debug_level > 0) {
            printf("   * Adding section at virtual address 0x%8.8x "
                   "(len=0x%8.8lx)\n",vaddr,(u_long)len);
         }
         
         while(len > 0)
         {
            haddr = cpu->mem_op_lookup(cpu,vaddr,PPC32_MTS_DCACHE);

            if (!haddr) {
               fprintf(stderr,"load_elf_image: invalid load address 0x%x\n",
                       vaddr);
               return(-1);
            }

            if (len > PPC32_MIN_PAGE_SIZE)
               clen = PPC32_MIN_PAGE_SIZE;
            else
               clen = len;

            remain = PPC32_MIN_PAGE_SIZE;
            remain -= (vaddr - (vaddr & PPC32_MIN_PAGE_MASK));

            clen = m_min(clen,remain);

            if (fread((u_char *)haddr,clen,1,bfd) < 1)
               break;

            vaddr += clen;
            len -= clen;
         }
      }
   } else {
      printf("ELF loading skipped, using a ghost RAM file.\n");
   }

   printf("ELF entry point: 0x%x\n",ehdr->e_entry);

   if (entry_point)
      *entry_point = ehdr->e_entry;

   elf_end(img_elf);
   fclose(bfd);
   return(0);
}
1	dpavlin	7	/*
2			* Cisco router simulation platform.
3			* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr)
4			*
5			* PowerPC (32-bit) generic routines.
6			*/
7
8			#include <stdio.h>
9			#include <stdlib.h>
10			#include <unistd.h>
11			#include <string.h>
12			#include <sys/types.h>
13			#include <sys/stat.h>
14			#include <sys/mman.h>
15			#include <fcntl.h>
16			#include <assert.h>
17
18			#include "rbtree.h"
19			#include "cpu.h"
20			#include "dynamips.h"
21			#include "memory.h"
22			#include "device.h"
23			#include "ppc32_mem.h"
24			#include "ppc32_exec.h"
25			#include "ppc32_jit.h"
26
27			/* Reset a PowerPC CPU */
28			int ppc32_reset(cpu_ppc_t *cpu)
29			{
30			cpu->ia = PPC32_ROM_START;
31			cpu->gpr[1] = PPC32_ROM_SP;
32			cpu->msr = PPC32_MSR_IP;
33
34			/* Restart the MTS subsystem */
35			ppc32_mem_restart(cpu);
36
37			/* Flush JIT structures */
38			ppc32_jit_flush(cpu,0);
39			return(0);
40			}
41
42			/* Initialize a PowerPC processor */
43			int ppc32_init(cpu_ppc_t *cpu)
44			{
45			/* Initialize idle timer */
46			cpu->gen->idle_max = 1500;
47			cpu->gen->idle_sleep_time = 30000;
48
49			/* Timer IRQ parameters (default frequency: 250 Hz <=> 4ms period) */
50			cpu->timer_irq_check_itv = 1000;
51			cpu->timer_irq_freq = 250;
52
53			/* Idle loop mutex and condition */
54			pthread_mutex_init(&cpu->gen->idle_mutex,NULL);
55			pthread_cond_init(&cpu->gen->idle_cond,NULL);
56
57			/* Set the CPU methods */
58			cpu->gen->reg_set = (void *)ppc32_reg_set;
59			cpu->gen->reg_dump = (void *)ppc32_dump_regs;
60			cpu->gen->mmu_dump = (void *)ppc32_dump_mmu;
61			cpu->gen->mmu_raw_dump = (void *)ppc32_dump_mmu;
62			cpu->gen->add_breakpoint = (void *)ppc32_add_breakpoint;
63			cpu->gen->remove_breakpoint = (void *)ppc32_remove_breakpoint;
64			cpu->gen->set_idle_pc = (void *)ppc32_set_idle_pc;
65			cpu->gen->get_idling_pc = (void *)ppc32_get_idling_pc;
66
67			/* Set the startup parameters */
68			ppc32_reset(cpu);
69			return(0);
70			}
71
72			/* Delete a PowerPC processor */
73			void ppc32_delete(cpu_ppc_t *cpu)
74			{
75			if (cpu) {
76			ppc32_mem_shutdown(cpu);
77			ppc32_jit_shutdown(cpu);
78			}
79			}
80
81			/* Set the processor version register (PVR) */
82			void ppc32_set_pvr(cpu_ppc_t *cpu,m_uint32_t pvr)
83			{
84			cpu->pvr = pvr;
85			ppc32_mem_restart(cpu);
86			}
87
88			/* Set idle PC value */
89			void ppc32_set_idle_pc(cpu_gen_t *cpu,m_uint64_t addr)
90			{
91			CPU_PPC32(cpu)->idle_pc = (m_uint32_t)addr;
92			}
93
94			/* Timer IRQ */
95			void ppc32_timer_irq_run(cpu_ppc_t cpu)
96			{
97			pthread_mutex_t umutex = PTHREAD_MUTEX_INITIALIZER;
98			pthread_cond_t ucond = PTHREAD_COND_INITIALIZER;
99			struct timespec t_spc;
100			m_tmcnt_t expire;
101			u_int interval;
102			u_int threshold;
103
104			#if 0
105			while(!cpu->timer_irq_armed)
106			sleep(1);
107			#endif
108
109			interval = 1000000 / cpu->timer_irq_freq;
110			threshold = cpu->timer_irq_freq * 10;
111			expire = m_gettime_usec() + interval;
112
113			while(cpu->gen->state != CPU_STATE_HALTED) {
114			pthread_mutex_lock(&umutex);
115			t_spc.tv_sec = expire / 1000000;
116			t_spc.tv_nsec = (expire % 1000000) * 1000;
117			pthread_cond_timedwait(&ucond,&umutex,&t_spc);
118			pthread_mutex_unlock(&umutex);
119
120			if (likely(!cpu->irq_disable) &&
121			likely(cpu->gen->state == CPU_STATE_RUNNING) &&
122			likely(cpu->msr & PPC32_MSR_EE))
123			{
124			cpu->timer_irq_pending++;
125
126			if (unlikely(cpu->timer_irq_pending > threshold)) {
127			cpu->timer_irq_pending = 0;
128			cpu->timer_drift++;
129			#if 0
130			printf("Timer IRQ not accurate (%u pending IRQ): "
131			"reduce the \"--timer-irq-check-itv\" parameter "
132			"(current value: %u)\n",
133			cpu->timer_irq_pending,cpu->timer_irq_check_itv);
134			#endif
135			}
136			}
137
138			expire += interval;
139			}
140
141			return NULL;
142			}
143
144			#define IDLE_HASH_SIZE 8192
145
146			/* Idle PC hash item */
147			struct ppc32_idle_pc_hash {
148			m_uint32_t ia;
149			u_int count;
150			struct ppc32_idle_pc_hash *next;
151			};
152
153			/* Determine an "idling" PC */
154			int ppc32_get_idling_pc(cpu_gen_t *cpu)
155			{
156			cpu_ppc_t *pcpu = CPU_PPC32(cpu);
157			struct ppc32_idle_pc_hash *pc_hash,p;
158			struct cpu_idle_pc *res;
159			u_int h_index,res_count;
160			m_uint32_t cur_ia;
161			int i;
162
163			cpu->idle_pc_prop_count = 0;
164
165			if (pcpu->idle_pc != 0) {
166			printf("\nYou already use an idle PC, using the calibration would give "
167			"incorrect results.\n");
168			return(-1);
169			}
170
171			printf("\nPlease wait while gathering statistics...\n");
172
173			pc_hash = calloc(IDLE_HASH_SIZE,sizeof(struct ppc32_idle_pc_hash *));
174
175			/* Disable IRQ */
176			pcpu->irq_disable = TRUE;
177
178			/* Take 1000 measures, each mesure every 10ms */
179			for(i=0;i<1000;i++) {
180			cur_ia = pcpu->ia;
181			h_index = (cur_ia >> 2) & (IDLE_HASH_SIZE-1);
182
183			for(p=pc_hash[h_index];p;p=p->next)
184			if (p->ia == cur_ia) {
185			p->count++;
186			break;
187			}
188
189			if (!p) {
190			if ((p = malloc(sizeof(*p)))) {
191			p->ia = cur_ia;
192			p->count = 1;
193			p->next = pc_hash[h_index];
194			pc_hash[h_index] = p;
195			}
196			}
197
198			usleep(10000);
199			}
200
201			/* Select PCs */
202			for(i=0,res_count=0;i<IDLE_HASH_SIZE;i++) {
203			for(p=pc_hash[i];p;p=p->next)
204			if ((p->count >= 20) && (p->count <= 80)) {
205			res = &cpu->idle_pc_prop[cpu->idle_pc_prop_count++];
206
207			res->pc = p->ia;
208			res->count = p->count;
209
210			if (cpu->idle_pc_prop_count >= CPU_IDLE_PC_MAX_RES)
211			goto done;
212			}
213			}
214
215			done:
216			/* Set idle PC */
217			if (cpu->idle_pc_prop_count) {
218			printf("Done. Suggested idling PC:\n");
219
220			for(i=0;i<cpu->idle_pc_prop_count;i++) {
221			printf(" 0x%llx (count=%u)\n",
222			cpu->idle_pc_prop[i].pc,
223			cpu->idle_pc_prop[i].count);
224			}
225
226			printf("Restart the emulator with \"--idle-pc=0x%llx\" (for example)\n",
227			cpu->idle_pc_prop[0].pc);
228			} else {
229			printf("Done. No suggestion for idling PC\n");
230			}
231
232			/* Re-enable IRQ */
233			pcpu->irq_disable = FALSE;
234			return(0);
235			}
236
237			#if 0
238			/* Set an IRQ (VM IRQ standard routing) */
239			void ppc32_vm_set_irq(vm_instance_t *vm,u_int irq)
240			{
241			cpu_ppc_t *boot_cpu;
242
243			boot_cpu = CPU_PPC32(vm->boot_cpu);
244
245			if (boot_cpu->irq_disable) {
246			boot_cpu->irq_pending = 0;
247			return;
248			}
249
250			ppc32_set_irq(boot_cpu,irq);
251
252			if (boot_cpu->irq_idle_preempt[irq])
253			cpu_idle_break_wait(vm->boot_cpu);
254			}
255
256			/* Clear an IRQ (VM IRQ standard routing) */
257			void ppc32_vm_clear_irq(vm_instance_t *vm,u_int irq)
258			{
259			cpu_ppc_t *boot_cpu;
260
261			boot_cpu = CPU_PPC32(vm->boot_cpu);
262			ppc32_clear_irq(boot_cpu,irq);
263			}
264			#endif
265
266			/* Generate an exception */
267			void ppc32_trigger_exception(cpu_ppc_t *cpu,u_int exc_vector)
268			{
269			//printf("TRIGGER_EXCEPTION: saving cpu->ia=0x%8.8x, msr=0x%8.8x\n",
270			// cpu->ia,cpu->msr);
271
272			/* Save the return instruction address */
273			cpu->srr0 = cpu->ia;
274
275			if (exc_vector == PPC32_EXC_SYSCALL)
276			cpu->srr0 += sizeof(ppc_insn_t);
277
278			//printf("SRR0 = 0x%8.8x\n",cpu->srr0);
279
280			/* Save Machine State Register (MSR) */
281			cpu->srr1 = cpu->msr & PPC32_EXC_SRR1_MASK;
282
283			//printf("SRR1 = 0x%8.8x\n",cpu->srr1);
284
285			/* Set the new SRR value */
286			cpu->msr &= ~PPC32_EXC_MSR_MASK;
287			cpu->irq_check = FALSE;
288
289			//printf("MSR = 0x%8.8x\n",cpu->msr);
290
291			/* Use bootstrap vectors ? */
292			if (cpu->msr & PPC32_MSR_IP)
293			cpu->ia = 0xFFF00000 + exc_vector;
294			else
295			cpu->ia = exc_vector;
296			}
297
298			/* Trigger IRQs */
299			fastcall void ppc32_trigger_irq(cpu_ppc_t *cpu)
300			{
301			if (unlikely(cpu->irq_disable)) {
302			cpu->irq_pending = FALSE;
303			cpu->irq_check = FALSE;
304			return;
305			}
306
307			/* Clear the IRQ check flag */
308			cpu->irq_check = FALSE;
309
310			if (cpu->irq_pending && (cpu->msr & PPC32_MSR_EE)) {
311			cpu->irq_count++;
312			cpu->irq_pending = FALSE;
313			ppc32_trigger_exception(cpu,PPC32_EXC_EXT);
314			}
315			}
316
317			/* Trigger the decrementer exception */
318			void ppc32_trigger_timer_irq(cpu_ppc_t *cpu)
319			{
320			cpu->timer_irq_count++;
321
322			if (cpu->msr & PPC32_MSR_EE)
323			ppc32_trigger_exception(cpu,PPC32_EXC_DEC);
324			}
325
326			/* Virtual breakpoint */
327			fastcall void ppc32_run_breakpoint(cpu_ppc_t *cpu)
328			{
329			cpu_log(cpu->gen,"BREAKPOINT",
330			"Virtual breakpoint reached at IA=0x%8.8x\n",cpu->ia);
331
332			printf("[[[ Virtual Breakpoint reached at IA=0x%8.8x LR=0x%8.8x]]]\n",
333			cpu->ia,cpu->lr);
334
335			ppc32_dump_regs(cpu->gen);
336			}
337
338			/* Add a virtual breakpoint */
339			int ppc32_add_breakpoint(cpu_gen_t *cpu,m_uint64_t ia)
340			{
341			cpu_ppc_t *pcpu = CPU_PPC32(cpu);
342			int i;
343
344			for(i=0;i<PPC32_MAX_BREAKPOINTS;i++)
345			if (!pcpu->breakpoints[i])
346			break;
347
348			if (i == PPC32_MAX_BREAKPOINTS)
349			return(-1);
350
351			pcpu->breakpoints[i] = ia;
352			pcpu->breakpoints_enabled = TRUE;
353			return(0);
354			}
355
356			/* Remove a virtual breakpoint */
357			void ppc32_remove_breakpoint(cpu_gen_t *cpu,m_uint64_t ia)
358			{
359			cpu_ppc_t *pcpu = CPU_PPC32(cpu);
360			int i,j;
361
362			for(i=0;i<PPC32_MAX_BREAKPOINTS;i++)
363			if (pcpu->breakpoints[i] == ia)
364			{
365			for(j=i;j<PPC32_MAX_BREAKPOINTS-1;j++)
366			pcpu->breakpoints[j] = pcpu->breakpoints[j+1];
367
368			pcpu->breakpoints[PPC32_MAX_BREAKPOINTS-1] = 0;
369			}
370
371			for(i=0;i<PPC32_MAX_BREAKPOINTS;i++)
372			if (pcpu->breakpoints[i] != 0)
373			return;
374
375			pcpu->breakpoints_enabled = FALSE;
376			}
377
378			/* Set a register */
379			void ppc32_reg_set(cpu_gen_t *cpu,u_int reg,m_uint64_t val)
380			{
381			if (reg < PPC32_GPR_NR)
382			CPU_PPC32(cpu)->gpr[reg] = (m_uint32_t)val;
383			}
384
385			/* Dump registers of a PowerPC processor */
386			void ppc32_dump_regs(cpu_gen_t *cpu)
387			{
388			cpu_ppc_t *pcpu = CPU_PPC32(cpu);
389			int i;
390
391			printf("PowerPC Registers:\n");
392
393			for(i=0;i<PPC32_GPR_NR/4;i++) {
394			printf(" $%2d = 0x%8.8x $%2d = 0x%8.8x"
395			" $%2d = 0x%8.8x $%2d = 0x%8.8x\n",
396			i4, pcpu->gpr[i4], (i4)+1, pcpu->gpr[(i4)+1],
397			(i4)+2, pcpu->gpr[(i4)+2], (i4)+3, pcpu->gpr[(i4)+3]);
398			}
399
400			printf("\n");
401			printf(" ia = 0x%8.8x, lr = 0x%8.8x\n", pcpu->ia, pcpu->lr);
402			printf(" cr = 0x%8.8x, msr = 0x%8.8x, xer = 0x%8.8x, dec = 0x%8.8x\n",
403			pcpu->cr, pcpu->msr,
404			pcpu->xer \| (pcpu->xer_ca << PPC32_XER_CA_BIT),
405			pcpu->dec);
406
407			printf(" sprg[0] = 0x%8.8x, sprg[1] = 0x%8.8x\n",
408			pcpu->sprg[0],pcpu->sprg[1]);
409
410			printf(" sprg[2] = 0x%8.8x, sprg[3] = 0x%8.8x\n",
411			pcpu->sprg[2],pcpu->sprg[3]);
412
413			printf("\n IRQ count: %llu, IRQ false positives: %llu, "
414			"IRQ Pending: %u, IRQ Check: %s\n",
415			pcpu->irq_count,pcpu->irq_fp_count,pcpu->irq_pending,
416			pcpu->irq_check ? "yes" : "no");
417
418			printf(" Timer IRQ count: %llu, pending: %u, timer drift: %u\n\n",
419			pcpu->timer_irq_count,pcpu->timer_irq_pending,pcpu->timer_drift);
420
421			printf("\n");
422			}
423
424			/* Dump BAT registers */
425			static void ppc32_dump_bat(cpu_ppc_t *cpu,int index)
426			{
427			int i;
428
429			for(i=0;i<PPC32_BAT_NR;i++)
430			printf(" BAT[%d] = 0x%8.8x 0x%8.8x\n",
431			i,cpu->bat[index][i].reg[0],cpu->bat[index][i].reg[1]);
432			}
433
434			/* Dump MMU registers */
435			void ppc32_dump_mmu(cpu_gen_t *cpu)
436			{
437			cpu_ppc_t *pcpu = CPU_PPC32(cpu);
438			int i;
439
440			printf("PowerPC MMU Registers:\n");
441
442			printf(" - IBAT Registers:\n");
443			ppc32_dump_bat(pcpu,PPC32_IBAT_IDX);
444
445			printf(" - DBAT Registers:\n");
446			ppc32_dump_bat(pcpu,PPC32_DBAT_IDX);
447
448			printf(" - Segment Registers:\n");
449			for(i=0;i<PPC32_SR_NR;i++)
450			printf(" SR[%d] = 0x%8.8x\n",i,pcpu->sr[i]);
451
452			printf(" - SDR1: 0x%8.8x\n",pcpu->sdr1);
453			}
454
455			/* Load a raw image into the simulated memory */
456			int ppc32_load_raw_image(cpu_ppc_t cpu,char filename,m_uint32_t vaddr)
457			{
458			struct stat file_info;
459			size_t len,clen;
460			m_uint32_t remain;
461			void *haddr;
462			FILE *bfd;
463
464			if (!(bfd = fopen(filename,"r"))) {
465			perror("fopen");
466			return(-1);
467			}
468
469			if (fstat(fileno(bfd),&file_info) == -1) {
470			perror("stat");
471			return(-1);
472			}
473
474			len = file_info.st_size;
475
476			printf("Loading RAW file '%s' at virtual address 0x%8.8x (size=%lu)\n",
477			filename,vaddr,(u_long)len);
478
479			while(len > 0)
480			{
481			haddr = cpu->mem_op_lookup(cpu,vaddr,PPC32_MTS_DCACHE);
482
483			if (!haddr) {
484			fprintf(stderr,"load_raw_image: invalid load address 0x%8.8x\n",
485			vaddr);
486			return(-1);
487			}
488
489			if (len > PPC32_MIN_PAGE_SIZE)
490			clen = PPC32_MIN_PAGE_SIZE;
491			else
492			clen = len;
493
494			remain = MIPS_MIN_PAGE_SIZE;
495			remain -= (vaddr - (vaddr & MIPS_MIN_PAGE_MASK));
496
497			clen = m_min(clen,remain);
498
499			if (fread((u_char *)haddr,clen,1,bfd) != 1)
500			break;
501
502			vaddr += clen;
503			len -= clen;
504			}
505
506			fclose(bfd);
507			return(0);
508			}
509
510			/* Load an ELF image into the simulated memory */
511			int ppc32_load_elf_image(cpu_ppc_t cpu,char filename,int skip_load,
512			m_uint32_t *entry_point)
513			{
514			m_uint32_t vaddr,remain;
515			void *haddr;
516			Elf32_Ehdr *ehdr;
517			Elf32_Shdr *shdr;
518			Elf_Scn *scn;
519			Elf *img_elf;
520			size_t len,clen;
521			char *name;
522			int i,fd;
523			FILE *bfd;
524
525			if (!filename)
526			return(-1);
527
528			#ifdef __CYGWIN__
529			fd = open(filename,O_RDONLY\|O_BINARY);
530			#else
531			fd = open(filename,O_RDONLY);
532			#endif
533
534			if (fd == -1) {
535			perror("load_elf_image: open");
536			return(-1);
537			}
538
539			if (elf_version(EV_CURRENT) == EV_NONE) {
540			fprintf(stderr,"load_elf_image: library out of date\n");
541			return(-1);
542			}
543
544			if (!(img_elf = elf_begin(fd,ELF_C_READ,NULL))) {
545			fprintf(stderr,"load_elf_image: elf_begin: %s\n",
546			elf_errmsg(elf_errno()));
547			return(-1);
548			}
549
550			if (!(ehdr = elf32_getehdr(img_elf))) {
551			fprintf(stderr,"load_elf_image: invalid ELF file\n");
552			return(-1);
553			}
554
555			printf("Loading ELF file '%s'...\n",filename);
556			bfd = fdopen(fd,"rb");
557
558			if (!bfd) {
559			perror("load_elf_image: fdopen");
560			return(-1);
561			}
562
563			if (!skip_load) {
564			for(i=0;i<ehdr->e_shnum;i++) {
565			scn = elf_getscn(img_elf,i);
566
567			shdr = elf32_getshdr(scn);
568			name = elf_strptr(img_elf, ehdr->e_shstrndx, (size_t)shdr->sh_name);
569			len = shdr->sh_size;
570
571			if (!(shdr->sh_flags & SHF_ALLOC) \|\| !len)
572			continue;
573
574			fseek(bfd,shdr->sh_offset,SEEK_SET);
575			vaddr = shdr->sh_addr;
576
577			if (cpu->vm->debug_level > 0) {
578			printf(" * Adding section at virtual address 0x%8.8x "
579			"(len=0x%8.8lx)\n",vaddr,(u_long)len);
580			}
581
582			while(len > 0)
583			{
584			haddr = cpu->mem_op_lookup(cpu,vaddr,PPC32_MTS_DCACHE);
585
586			if (!haddr) {
587			fprintf(stderr,"load_elf_image: invalid load address 0x%x\n",
588			vaddr);
589			return(-1);
590			}
591
592			if (len > PPC32_MIN_PAGE_SIZE)
593			clen = PPC32_MIN_PAGE_SIZE;
594			else
595			clen = len;
596
597			remain = PPC32_MIN_PAGE_SIZE;
598			remain -= (vaddr - (vaddr & PPC32_MIN_PAGE_MASK));
599
600			clen = m_min(clen,remain);
601
602			if (fread((u_char *)haddr,clen,1,bfd) < 1)
603			break;
604
605			vaddr += clen;
606			len -= clen;
607			}
608			}
609			} else {
610			printf("ELF loading skipped, using a ghost RAM file.\n");
611			}
612
613			printf("ELF entry point: 0x%x\n",ehdr->e_entry);
614
615			if (entry_point)
616			*entry_point = ehdr->e_entry;
617
618			elf_end(img_elf);
619			fclose(bfd);
620			return(0);
621			}