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/* |
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* Cisco router simulation platform. |
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* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr) |
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*/ |
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#define _GNU_SOURCE |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/mman.h> |
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#include <fcntl.h> |
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#include <assert.h> |
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#include "cpu.h" |
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#include "vm.h" |
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#include "dynamips.h" |
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#include "memory.h" |
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#include "device.h" |
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/* Record a memory access */ |
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void memlog_rec_access(cpu_gen_t *cpu,m_uint64_t vaddr,m_uint64_t data, |
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m_uint32_t op_size,m_uint32_t op_type) |
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{ |
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memlog_access_t *acc; |
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acc = &cpu->memlog_array[cpu->memlog_pos]; |
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acc->iaddr = cpu_get_pc(cpu); |
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acc->vaddr = vaddr; |
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acc->data = data; |
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acc->op_size = op_size; |
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acc->op_type = op_type; |
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acc->data_valid = (op_type == MTS_WRITE); |
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cpu->memlog_pos = (cpu->memlog_pos + 1) & (MEMLOG_COUNT - 1); |
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} |
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/* Show the latest memory accesses */ |
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void memlog_dump(cpu_gen_t *cpu) |
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{ |
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memlog_access_t *acc; |
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char s_data[64]; |
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u_int i,pos; |
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for(i=0;i<MEMLOG_COUNT;i++) { |
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pos = cpu->memlog_pos + i; |
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pos &= (MEMLOG_COUNT-1); |
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acc = &cpu->memlog_array[pos]; |
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if (cpu_get_pc(cpu)) { |
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if (acc->data_valid) |
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snprintf(s_data,sizeof(s_data),"0x%llx",acc->data); |
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else |
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snprintf(s_data,sizeof(s_data),"XXXXXXXX"); |
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printf("CPU%u: pc=0x%8.8llx, vaddr=0x%8.8llx, " |
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"size=%u, type=%s, data=%s\n", |
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cpu->id,acc->iaddr,acc->vaddr,acc->op_size, |
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(acc->op_type == MTS_READ) ? "read " : "write", |
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s_data); |
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} |
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} |
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} |
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/* Update the data obtained by a read access */ |
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void memlog_update_read(cpu_gen_t *cpu,m_iptr_t raddr) |
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{ |
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memlog_access_t *acc; |
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acc = &cpu->memlog_array[(cpu->memlog_pos-1) & (MEMLOG_COUNT-1)]; |
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if (acc->op_type == MTS_READ) |
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{ |
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switch(acc->op_size) { |
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case 1: |
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acc->data = *(m_uint8_t *)raddr; |
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break; |
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case 2: |
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acc->data = vmtoh16(*(m_uint16_t *)raddr); |
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break; |
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case 4: |
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acc->data = vmtoh32(*(m_uint32_t *)raddr); |
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break; |
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case 8: |
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acc->data = vmtoh64(*(m_uint64_t *)raddr); |
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break; |
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} |
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acc->data_valid = TRUE; |
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} |
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} |
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/* === Operations on physical memory ====================================== */ |
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/* Get host pointer for the physical address */ |
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static inline void *physmem_get_hptr(vm_instance_t *vm,m_uint64_t paddr, |
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u_int op_size,u_int op_type, |
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m_uint64_t *data) |
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{ |
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struct vdevice *dev; |
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m_uint32_t offset; |
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void *ptr; |
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int cow; |
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|
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if (!(dev = dev_lookup(vm,paddr,FALSE))) |
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return NULL; |
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if (dev->flags & VDEVICE_FLAG_SPARSE) { |
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ptr = (void *)dev_sparse_get_host_addr(vm,dev,paddr,op_type,&cow); |
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if (!ptr) return NULL; |
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return(ptr + (paddr & VM_PAGE_IMASK)); |
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} |
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if ((dev->host_addr != 0) && !(dev->flags & VDEVICE_FLAG_NO_MTS_MMAP)) |
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return((void *)dev->host_addr + (paddr - dev->phys_addr)); |
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if (op_size == 0) |
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return NULL; |
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offset = paddr - dev->phys_addr; |
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return(dev->handler(vm->boot_cpu,dev,offset,op_size,op_type,data)); |
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} |
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/* Copy a memory block from VM physical RAM to real host */ |
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void physmem_copy_from_vm(vm_instance_t *vm,void *real_buffer, |
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m_uint64_t paddr,size_t len) |
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{ |
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m_uint64_t dummy; |
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m_uint32_t r; |
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u_char *ptr; |
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while(len > 0) { |
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r = m_min(VM_PAGE_SIZE - (paddr & VM_PAGE_IMASK), len); |
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ptr = physmem_get_hptr(vm,paddr,0,MTS_READ,&dummy); |
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if (likely(ptr != NULL)) { |
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memcpy(real_buffer,ptr,r); |
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} else { |
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r = m_min(len,4); |
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switch(r) { |
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case 4: |
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*(m_uint32_t *)real_buffer = |
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htovm32(physmem_copy_u32_from_vm(vm,paddr)); |
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break; |
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case 2: |
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*(m_uint16_t *)real_buffer = |
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htovm16(physmem_copy_u16_from_vm(vm,paddr)); |
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break; |
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case 1: |
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*(m_uint8_t *)real_buffer = physmem_copy_u8_from_vm(vm,paddr); |
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break; |
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} |
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} |
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real_buffer += r; |
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paddr += r; |
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len -= r; |
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} |
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} |
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/* Copy a memory block to VM physical RAM from real host */ |
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void physmem_copy_to_vm(vm_instance_t *vm,void *real_buffer, |
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m_uint64_t paddr,size_t len) |
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{ |
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m_uint64_t dummy; |
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m_uint32_t r; |
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u_char *ptr; |
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while(len > 0) { |
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r = m_min(VM_PAGE_SIZE - (paddr & VM_PAGE_IMASK), len); |
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ptr = physmem_get_hptr(vm,paddr,0,MTS_WRITE,&dummy); |
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if (likely(ptr != NULL)) { |
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memcpy(ptr,real_buffer,r); |
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} else { |
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r = m_min(len,4); |
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switch(r) { |
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case 4: |
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physmem_copy_u32_to_vm(vm,paddr, |
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htovm32(*(m_uint32_t *)real_buffer)); |
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break; |
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case 2: |
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physmem_copy_u16_to_vm(vm,paddr, |
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htovm16(*(m_uint16_t *)real_buffer)); |
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break; |
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case 1: |
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physmem_copy_u8_to_vm(vm,paddr,*(m_uint8_t *)real_buffer); |
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break; |
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} |
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} |
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real_buffer += r; |
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paddr += r; |
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len -= r; |
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} |
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} |
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/* Copy a 32-bit word from the VM physical RAM to real host */ |
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m_uint32_t physmem_copy_u32_from_vm(vm_instance_t *vm,m_uint64_t paddr) |
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{ |
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m_uint64_t tmp = 0; |
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m_uint32_t *ptr; |
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if ((ptr = physmem_get_hptr(vm,paddr,4,MTS_READ,&tmp)) != NULL) |
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return(vmtoh32(*ptr)); |
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return(tmp); |
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} |
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/* Copy a 32-bit word to the VM physical RAM from real host */ |
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void physmem_copy_u32_to_vm(vm_instance_t *vm,m_uint64_t paddr,m_uint32_t val) |
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{ |
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m_uint64_t tmp = val; |
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m_uint32_t *ptr; |
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if ((ptr = physmem_get_hptr(vm,paddr,4,MTS_WRITE,&tmp)) != NULL) |
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*ptr = htovm32(val); |
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} |
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/* Copy a 16-bit word from the VM physical RAM to real host */ |
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m_uint16_t physmem_copy_u16_from_vm(vm_instance_t *vm,m_uint64_t paddr) |
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{ |
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m_uint64_t tmp = 0; |
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m_uint16_t *ptr; |
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if ((ptr = physmem_get_hptr(vm,paddr,2,MTS_READ,&tmp)) != NULL) |
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return(vmtoh16(*ptr)); |
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return(tmp); |
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} |
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/* Copy a 16-bit word to the VM physical RAM from real host */ |
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void physmem_copy_u16_to_vm(vm_instance_t *vm,m_uint64_t paddr,m_uint16_t val) |
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{ |
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m_uint64_t tmp = val; |
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m_uint16_t *ptr; |
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if ((ptr = physmem_get_hptr(vm,paddr,2,MTS_WRITE,&tmp)) != NULL) |
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*ptr = htovm16(val); |
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} |
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/* Copy a byte from the VM physical RAM to real host */ |
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m_uint8_t physmem_copy_u8_from_vm(vm_instance_t *vm,m_uint64_t paddr) |
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{ |
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m_uint64_t tmp = 0; |
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m_uint8_t *ptr; |
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if ((ptr = physmem_get_hptr(vm,paddr,1,MTS_READ,&tmp)) != NULL) |
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return(*ptr); |
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return(tmp); |
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} |
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/* Copy a 16-bit word to the VM physical RAM from real host */ |
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void physmem_copy_u8_to_vm(vm_instance_t *vm,m_uint64_t paddr,m_uint8_t val) |
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{ |
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m_uint64_t tmp = val; |
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m_uint8_t *ptr; |
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if ((ptr = physmem_get_hptr(vm,paddr,1,MTS_WRITE,&tmp)) != NULL) |
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*ptr = val; |
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} |
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/* DMA transfer operation */ |
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void physmem_dma_transfer(vm_instance_t *vm,m_uint64_t src,m_uint64_t dst, |
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size_t len) |
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{ |
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m_uint64_t dummy; |
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u_char *sptr,*dptr; |
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size_t clen,sl,dl; |
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|
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while(len > 0) { |
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sptr = physmem_get_hptr(vm,src,0,MTS_READ,&dummy); |
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dptr = physmem_get_hptr(vm,dst,0,MTS_WRITE,&dummy); |
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if (!sptr || !dptr) { |
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vm_log(vm,"DMA","unable to transfer from 0x%llx to 0x%llx\n",src,dst); |
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return; |
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} |
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sl = VM_PAGE_SIZE - (src & VM_PAGE_IMASK); |
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dl = VM_PAGE_SIZE - (dst & VM_PAGE_IMASK); |
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clen = m_min(sl,dl); |
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clen = m_min(clen,len); |
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memcpy(dptr,sptr,clen); |
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src += clen; |
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dst += clen; |
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len -= clen; |
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} |
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} |
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/* strlen in VM physical memory */ |
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size_t physmem_strlen(vm_instance_t *vm,m_uint64_t paddr) |
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{ |
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struct vdevice *vm_ram; |
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size_t len = 0; |
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char *ptr; |
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if ((vm_ram = dev_lookup(vm,paddr,TRUE)) != NULL) { |
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ptr = (char *)vm_ram->host_addr + (paddr - vm_ram->phys_addr); |
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len = strlen(ptr); |
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} |
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return(len); |
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} |
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/* Physical memory dump (32-bit words) */ |
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void physmem_dump_vm(vm_instance_t *vm,m_uint64_t paddr,m_uint32_t u32_count) |
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{ |
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m_uint32_t i; |
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for(i=0;i<u32_count;i++) { |
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vm_log(vm,"physmem_dump","0x%8.8llx: 0x%8.8x\n", |
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paddr+(i<<2),physmem_copy_u32_from_vm(vm,paddr+(i<<2))); |
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} |
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} |