forked from Lephenixnoir/gint
122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
//---
|
|
// core:mmu - MMU-related definitions
|
|
//
|
|
// gint does not touch the MMU because the risk of permanently wreaking
|
|
// the system is deemed too high. However, to ensure that the add-in runs
|
|
// properly, checks using read-only accesses to the MMU are performed.
|
|
//---
|
|
|
|
#ifndef GINT_CORE_MMU
|
|
#define GINT_CORE_MMU
|
|
|
|
#include <gint/defs/attributes.h>
|
|
#include <gint/defs/types.h>
|
|
|
|
//---
|
|
// SH7705 TLB
|
|
//---
|
|
|
|
/* tlb_addr_t - address part of a TLB entry */
|
|
typedef struct
|
|
{
|
|
uint VPN :22;
|
|
uint :1;
|
|
uint V :1;
|
|
uint ASID :8;
|
|
|
|
} GPACKED(4) tlb_addr_t;
|
|
|
|
/* tlb_data_t - data part of a TLB entry */
|
|
typedef struct
|
|
{
|
|
uint :3;
|
|
uint PPN :19;
|
|
uint :1;
|
|
uint V :1;
|
|
uint :1;
|
|
uint PR :2;
|
|
uint SZ :1;
|
|
uint C :1;
|
|
uint D :1;
|
|
uint SH :1;
|
|
uint :1;
|
|
|
|
} GPACKED(4) tlb_data_t;
|
|
|
|
/* 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. */
|
|
const tlb_addr_t *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. */
|
|
const tlb_data_t *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_t - address part of a UTLB entry */
|
|
typedef struct
|
|
{
|
|
uint VPN :22;
|
|
uint D :1;
|
|
uint V :1;
|
|
uint ASID :8;
|
|
|
|
} GPACKED(4) utlb_addr_t;
|
|
|
|
/* 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_t - data part of a UTLB entry */
|
|
typedef struct
|
|
{
|
|
uint :3;
|
|
uint PPN :19;
|
|
uint :1;
|
|
uint V :1;
|
|
uint SZ1 :1;
|
|
uint PR :2;
|
|
uint SZ2 :1;
|
|
uint C :1;
|
|
uint D :1;
|
|
uint SH :1;
|
|
uint WT :1;
|
|
|
|
} GPACKED(4) utlb_data_t;
|
|
|
|
/* 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. */
|
|
const utlb_data_t *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_CORE_MMU */
|