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Manage noMMU and powerPC

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This commit is contained in:
Laurent Vivier 2004-02-26 22:56:39 +00:00
parent 1e57642a54
commit 40ea3746d5
2 changed files with 72 additions and 16 deletions
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76
second/bank.c
View File

@ -8,10 +8,19 @@
#include <stdio.h>
#include "arch.h"
#include "lowmem.h"
#include "MMU.h"
#include "bank.h"
/* MacOS nanokernel data structures (nubus powerPC only)
* found in Boot/X, thank you Ben ;-)
*/
#define MACOS_MEMMAP_PTR_ADDR 0x5FFFEFF0
#define MACOS_MEMMAP_SIZE_ADDR 0x5FFFEFF6
#define MACOS_MEMMAP_BANK_0FFSET 48
memory_map_t memory_map = { { { 0, 0 } }, 0 };
static void bank_add_mem(unsigned long logiAddr,
@ -76,23 +85,19 @@ static void bank_add_mem(unsigned long logiAddr,
memory_map.bank_number++;
}
void init_memory_map()
void m68k_init_memory_map()
{
unsigned long logical;
unsigned long physical;
int ps = get_page_size();
int ps;
#ifdef DUMP_MEMMAP
for (logical = 0; logical < MemTop ; logical += ps)
if (mmu_type == gestaltNoMMU)
{
printf("%08lx->", logical);
if (logical2physical(logical, &physical) == 0)
printf("%08lx ", physical);
else
printf("INVALID! ");
bank_add_mem(0, 0, MemTop);
}
while(1);
#endif
else
{
ps = MMU_get_page_size();
memory_map.bank_number = 0;
logical = 0;
for (logical = 0; logical < MemTop ; logical += ps)
@ -102,6 +107,43 @@ void init_memory_map()
bank_add_mem(logical, physical, ps);
}
}
}
}
void ppc_init_memory_map()
{
/* Nubus powerPC */
unsigned long *base = *(unsigned long**)MACOS_MEMMAP_PTR_ADDR;
unsigned long len = *(unsigned short*)MACOS_MEMMAP_SIZE_ADDR;
int i;
if (len <= MACOS_MEMMAP_BANK_0FFSET)
return;
base += MACOS_MEMMAP_BANK_0FFSET;
len -= MACOS_MEMMAP_BANK_0FFSET;
i = 0;
while(len >= 8)
{
unsigned long addr = *(unsigned long*)base;
unsigned long size = *(unsigned long*)(base+4);
if (size)
bank_add_mem(addr, addr, size);
base += 8;
len -= 8;
}
}
void init_memory_map()
{
if (arch_type == gestaltPowerPC)
ppc_init_memory_map();
else
m68k_init_memory_map();
}
static int bank_find_by_physical(unsigned long physical)
@ -118,6 +160,18 @@ static int bank_find_by_physical(unsigned long physical)
return -1;
}
int logical2physical(unsigned long logical, unsigned long *physical)
{
if ( (mmu_type == gestaltNoMMU) || (mmu_type == gestaltEMMU1) )
{
*physical = logical;
return 0;
}
return MMU_logical2physical(logical, physical);
}
int physical2logical(unsigned long physical, unsigned long *logical)
{
int bank;

2
second/bank.h
View File

@ -24,3 +24,5 @@ extern memory_map_t memory_map;
extern void init_memory_map();
extern unsigned long bank_mem_avail();
extern void bank_dump();
extern int logical2physical(unsigned long logical, unsigned long *physical);
extern int physical2logical(unsigned long physical, unsigned long *logical);