forked from Lephenixnoir/gint
Lephe
4ad2110efc
This change modifies the fx-CG 50 linker script to allow add-ins up to 2M and no longer complains about add-ins that don't fit in the TLB. It also exposes the __TLB_LoadPTEH() syscall (%003 on fx9860g, %00c on fxcg50) that answers TLB misses. This syscall can be called manually from an add-in to load some pages and seems to work without problem. However, this version does not provide any automatic TLB management, some key areas of the kernel are still under TLB and some user code (such as timer callbacks) is not! This version is suitable only for add-ins smaller than 220k!
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
//---
|
|
// gint:mmu - Memory Management Unit
|
|
//---
|
|
|
|
#ifndef GINT_MMU
|
|
#define GINT_MMU
|
|
|
|
#include <gint/mpu/mmu.h>
|
|
|
|
//---
|
|
// SH7705 TLB
|
|
//---
|
|
|
|
/* tlb_addr() - get the P4 address of a TLB address entry
|
|
@way TLB way (0..3)
|
|
@E Entry number (0..31)
|
|
Returns a pointer to the entry. */
|
|
tlb_addr_t const *tlb_addr(uint way, uint E);
|
|
|
|
/* tlb_data() - get the P4 address of a TLB data entry
|
|
@way TLB way (0..3)
|
|
@E Entry number (0..31)
|
|
Returns a pointer to the entry. */
|
|
tlb_data_t const *tlb_data(uint way, uint E);
|
|
|
|
/* tlb_mapped_memory() - count amount of mapped memory
|
|
This function returns the amount of mapped text and data segment memory, in
|
|
bytes. The ranges are defined as follows:
|
|
ROM 00300000:512k
|
|
RAM 08100000:512k
|
|
Other mappings are ignored. Both pointers may be NULL.
|
|
|
|
@rom Pointer to amount of mapped ROM
|
|
@ram Pointer to amount of mapped RAM */
|
|
void tlb_mapped_memory(uint32_t *p_rom, uint32_t *p_ram);
|
|
|
|
//---
|
|
// SH7305 Unified TLB
|
|
//---
|
|
|
|
/* utlb_addr() - get the P4 address of a UTLB address entry
|
|
@E Entry number (should be in range 0..63)
|
|
Returns a pointer to the entry. */
|
|
const utlb_addr_t *utlb_addr(uint E);
|
|
|
|
/* utlb_data() - get the P4 address of a UTLB data entry
|
|
@E Entry number (should be in range 0..63)
|
|
Returns a pointer to the entry. */
|
|
utlb_data_t const *utlb_data(uint E);
|
|
|
|
/* utlb_mapped_memory() - count amount of mapped memory
|
|
This function returns the amount of mapped text and data segment memory, in
|
|
bytes. The ranges are defined as follows:
|
|
ROM 00300000:4M
|
|
RAM 08100000:512k
|
|
Other mappings are ignored. Both pointers may be NULL.
|
|
|
|
@rom Pointer to amount of mapped ROM
|
|
@ram Pointer to amount of mapped RAM */
|
|
void utlb_mapped_memory(uint32_t *rom, uint32_t *ram);
|
|
|
|
#endif /* GINT_MMU */
|