* ARM7 Virtual Memory Manager
* - arch/arm7/mm_virt.c
*/
+#define DEBUG 0
#include <acess.h>
#include <mm_virt.h>
+#include <hal_proc.h>
#define AP_KRW_ONLY 0x1
#define AP_KRO_ONLY 0x5
#define AP_RW_BOTH 0x3
#define AP_RO_BOTH 0x6
+// === IMPORTS ===
+extern Uint32 kernel_table0[];
+
// === TYPES ===
typedef struct
{
int AP;
} tMM_PageInfo;
+//#define FRACTAL(table1, addr) ((table1)[ (0xFF8/4*1024) + ((addr)>>20)])
+#define FRACTAL(table1, addr) ((table1)[ (0xFF8/4*1024) + ((addr)>>22)])
+#define TLBIALL() __asm__ __volatile__ ("mcr p15, 0, %0, c8, c7, 0" : : "r" (0))
+
// === PROTOTYPES ===
+void MM_int_GetTables(tVAddr VAddr, Uint32 **Table0, Uint32 **Table1);
+ int MM_int_AllocateCoarse(tVAddr VAddr, int Domain);
int MM_int_SetPageInfo(tVAddr VAddr, tMM_PageInfo *pi);
int MM_int_GetPageInfo(tVAddr VAddr, tMM_PageInfo *pi);
return 0;
}
-int MM_int_SetPageInfo(tVAddr VAddr, tMM_PageInfo *pi)
+void MM_int_GetTables(tVAddr VAddr, Uint32 **Table0, Uint32 **Table1)
+{
+ if(VAddr & 0x80000000) {
+ *Table0 = (void*)&kernel_table0; // Level 0
+ *Table1 = (void*)MM_TABLE1KERN; // Level 1
+ }
+ else {
+ *Table0 = (void*)MM_TABLE0USER;
+ *Table1 = (void*)MM_TABLE1USER;
+ }
+}
+
+int MM_int_AllocateCoarse(tVAddr VAddr, int Domain)
{
Uint32 *table0, *table1;
Uint32 *desc;
+ tPAddr paddr;
+
+ ENTER("xVAddr iDomain", VAddr, Domain);
+
+ MM_int_GetTables(VAddr, &table0, &table1);
+
+ VAddr &= ~(0x400000-1); // 4MiB per "block", 1 Page
- if(VAddr & 0x80000000 ) {
- table0 = (void*)MM_TABLE0KERN; // Level 0
- table1 = (void*)MM_TABLE1KERN; // Level 1
+ desc = &table0[ VAddr>>20];
+ LOG("desc = %p", desc);
+
+ // table0: 4 bytes = 1 MiB
+
+ LOG("desc[0] = %x", desc[0]);
+ LOG("desc[1] = %x", desc[1]);
+ LOG("desc[2] = %x", desc[2]);
+ LOG("desc[3] = %x", desc[3]);
+
+ if( (desc[0] & 3) != 0 || (desc[1] & 3) != 0
+ || (desc[2] & 3) != 0 || (desc[3] & 3) != 0 )
+ {
+ // Error?
+ LEAVE('i', 1);
+ return 1;
}
- else {
- table0 = (void*)MM_TABLE0USER;
- table1 = (void*)MM_TABLE1USER;
+
+ paddr = MM_AllocPhys();
+ if( !paddr )
+ {
+ // Error
+ LEAVE('i', 2);
+ return 2;
}
- VAddr &= 0x7FFFFFFF;
+
+ *desc = paddr | (Domain << 5) | 1;
+ desc[1] = desc[0] + 0x400;
+ desc[2] = desc[0] + 0x800;
+ desc[3] = desc[0] + 0xC00;
+
+ FRACTAL(table1, VAddr) = paddr | 3;
+
+ // TLBIALL
+ TLBIALL();
+
+ LEAVE('i', 0);
+ return 0;
+}
+
+int MM_int_SetPageInfo(tVAddr VAddr, tMM_PageInfo *pi)
+{
+ Uint32 *table0, *table1;
+ Uint32 *desc;
+
+ ENTER("pVADdr ppi", VAddr, pi);
+
+ MM_int_GetTables(VAddr, &table0, &table1);
desc = &table0[ VAddr >> 20 ];
+ LOG("desc = %p", desc);
switch(pi->Size)
{
case 12: // Small Page
case 16: // Large Page
+ LOG("Page");
if( (*desc & 3) == 0 ) {
- if( pi->PhysAddr == 0 ) return 0;
- // Allocate
- *desc = MM_AllocPhys();
- *desc |= pi->Domain << 5;
- *desc |= 1;
+ MM_int_AllocateCoarse( VAddr, pi->Domain );
}
desc = &table1[ VAddr >> 12 ];
+ LOG("desc (2) = %p", desc);
if( pi->Size == 12 )
{
// Small page
// - Error if overwriting a large page
- if( (*desc & 3) == 1 ) return 1;
+ if( (*desc & 3) == 1 ) LEAVE_RET('i', 1);
if( pi->PhysAddr == 0 ) {
*desc = 0;
+ LEAVE('i', 0);
return 0;
}
if( pi->bShared) *desc |= 1 << 10; // S
*desc |= (pi->AP & 3) << 4; // AP
*desc |= ((pi->AP >> 2) & 1) << 9; // APX
+ LEAVE('i', 0);
+ return 0;
}
else
{
}
break;
case 20: // Section or unmapped
- Log_Warning("MM", "TODO: Implement sections");
+ Warning("TODO: Implement sections");
break;
case 24: // Supersection
// Error if not aligned
if( VAddr & 0xFFFFFF ) {
+ LEAVE('i', 1);
return 1;
}
if( (*desc & 3) == 0 || ((*desc & 3) == 2 && (*desc & (1 << 18))) )
if( pi->PhysAddr == 0 ) {
*desc = 0;
// TODO: Apply to all entries
+ LEAVE('i', 0);
return 0;
}
// Apply
// *desc |= ((pi->PhysAddr >> 36) & 0x7) << 5;
*desc |= 2 | (1 << 18);
// TODO: Apply to all entries
+ LEAVE('i', 0);
return 0;
}
+ // TODO: What here?
+ LEAVE('i', 1);
return 1;
}
+ LEAVE('i', 1);
return 1;
}
+extern tShortSpinlock glDebug_Lock;
+
int MM_int_GetPageInfo(tVAddr VAddr, tMM_PageInfo *pi)
{
Uint32 *table0, *table1;
Uint32 desc;
-
- if(VAddr & 0x80000000 ) {
- table0 = (void*)MM_TABLE0KERN; // Level 0
- table1 = (void*)MM_TABLE1KERN; // Level 1
- }
- else {
- table0 = (void*)MM_TABLE0USER;
- table1 = (void*)MM_TABLE1USER;
- }
- VAddr &= 0x7FFFFFFF;
+
+ MM_int_GetTables(VAddr, &table0, &table1);
desc = table0[ VAddr >> 20 ];
+
+// if( VAddr > 0x90000000)
+// LOG("table0 desc(%p) = %x", &table0[ VAddr >> 20 ], desc);
pi->bExecutable = 1;
pi->bGlobal = 0;
pi->bShared = 0;
+
switch( (desc & 3) )
{
// 0: Unmapped
pi->Domain = (desc >> 5) & 7;
// Get next level
desc = table1[ VAddr >> 12 ];
+// LOG("table1 desc(%p) = %x", &table1[ VAddr >> 12 ], desc);
switch( desc & 3 )
{
// 0: Unmapped
pi->bExecutable = desc & 1;
pi->bGlobal = !(desc >> 11);
pi->bShared = (desc >> 10) & 1;
- return 1;
+ return 0;
}
return 1;
tMM_PageInfo pi;
if( MM_int_GetPageInfo(VAddr, &pi) )
return 0;
- return pi.PhysAddr;
+ return pi.PhysAddr | (VAddr & ((1 << pi.Size)-1));
}
Uint MM_GetFlags(tVAddr VAddr)
tPAddr MM_Allocate(tVAddr VAddr)
{
tMM_PageInfo pi = {0};
+
+ ENTER("pVAddr", VAddr);
pi.PhysAddr = MM_AllocPhys();
- if( pi.PhysAddr == 0 ) return 0;
+ if( pi.PhysAddr == 0 ) LEAVE_RET('i', 0);
pi.Size = 12;
pi.AP = AP_KRW_ONLY; // Kernel Read/Write
pi.bExecutable = 1;
if( MM_int_SetPageInfo(VAddr, &pi) ) {
MM_DerefPhys(pi.PhysAddr);
+ LEAVE('i', 0);
return 0;
}
+ LEAVE('x', pi.PhysAddr);
return pi.PhysAddr;
}
pi.bExecutable = 0;
MM_int_SetPageInfo(VAddr, &pi);
}
+
+tPAddr MM_ClearUser(void)
+{
+ // TODO: Implement ClearUser
+ return 0;
+}
+
+tVAddr MM_MapTemp(tPAddr PAddr)
+{
+ // TODO: Implement MapTemp
+ return 0;
+}
+
+void MM_FreeTemp(tVAddr VAddr)
+{
+ // TODO: Implement FreeTemp
+}
+
+void MM_DumpTables(tVAddr Start, tVAddr End)
+{
+
+}
+
git.ucc.asn.au / tpg / acess2.git / blobdiff
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