#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
+#define AP_KRW_ONLY 1 // Kernel page
+#define AP_KRO_ONLY 5 // Kernel RO page
+#define AP_RW_BOTH 3 // Standard RW
+#define AP_RO_BOTH 6 // COW Page
+#define AP_RO_USER 2 // User RO Page
+#define PADDR_MASK_LVL1 0xFFFFFC00
// === IMPORTS ===
extern Uint32 kernel_table0[];
//#define FRACTAL(table1, addr) ((table1)[ (0xFF8/4*1024) + ((addr)>>20)])
#define FRACTAL(table1, addr) ((table1)[ (0xFF8/4*1024) + ((addr)>>22)])
+#define USRFRACTAL(addr) (*((Uint32*)(0x7FDFF000) + ((addr)>>22)))
#define TLBIALL() __asm__ __volatile__ ("mcr p15, 0, %0, c8, c7, 0" : : "r" (0))
+#define TLBIMVA(addr) __asm__ __volatile__ ("mcr p15, 0, %0, c8, c7, 1" : : "r" (addr))
// === 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);
+tVAddr MM_NewUserStack(void);
+tPAddr MM_AllocateZero(tVAddr VAddr);
+tPAddr MM_AllocateRootTable(void);
+void MM_int_CloneTable(Uint32 *DestEnt, int Table);
+tPAddr MM_Clone(void);
tVAddr MM_NewKStack(int bGlobal);
+void MM_int_DumpTableEnt(tVAddr Start, size_t Len, tMM_PageInfo *Info);
+//void MM_DumpTables(tVAddr Start, tVAddr End);
// === GLOBALS ===
+tPAddr giMM_ZeroPage;
// === CODE ===
int MM_InitialiseVirtual(void)
desc[2] = desc[0] + 0x800;
desc[3] = desc[0] + 0xC00;
- FRACTAL(table1, VAddr) = paddr | 3;
+ if( VAddr < 0x80000000 ) {
+// Log("USRFRACTAL(%p) = %p", VAddr, &USRFRACTAL(VAddr));
+ USRFRACTAL(VAddr) = paddr | 3;
+ }
+ else {
+// Log("FRACTAL(%p) = %p", VAddr, &FRACTAL(table1, VAddr));
+ FRACTAL(table1, VAddr) = paddr | 3;
+ }
// TLBIALL
TLBIALL();
Uint32 *table0, *table1;
Uint32 *desc;
- ENTER("pVADdr ppi", VAddr, pi);
+ ENTER("pVAddr ppi", VAddr, pi);
MM_int_GetTables(VAddr, &table0, &table1);
if( pi->bShared) *desc |= 1 << 10; // S
*desc |= (pi->AP & 3) << 4; // AP
*desc |= ((pi->AP >> 2) & 1) << 9; // APX
+ TLBIMVA(VAddr & 0xFFFFF000);
LEAVE('i', 0);
return 0;
}
{
// Large page
// TODO:
+ Log_Warning("MMVirt", "TODO: Implement large pages in MM_int_SetPageInfo");
}
break;
case 20: // Section or unmapped
return 1;
}
-extern tShortSpinlock glDebug_Lock;
-
int MM_int_GetPageInfo(tVAddr VAddr, tMM_PageInfo *pi)
{
Uint32 *table0, *table1;
Uint32 desc;
+
+// LogF("MM_int_GetPageInfo: VAddr=%p, pi=%p\n", VAddr, pi);
MM_int_GetTables(VAddr, &table0, &table1);
pi->bExecutable = 1;
pi->bGlobal = 0;
pi->bShared = 0;
-
+ pi->AP = 0;
switch( (desc & 3) )
{
case 1:
pi->Size = 16;
pi->PhysAddr = desc & 0xFFFF0000;
+ pi->AP = ((desc >> 4) & 3) | (((desc >> 9) & 1) << 2);
+ pi->bExecutable = !(desc & 0x8000);
+ pi->bShared = (desc >> 10) & 1;
return 0;
// 2/3: Small page
case 2:
case 3:
pi->Size = 12;
pi->PhysAddr = desc & 0xFFFFF000;
- pi->bExecutable = desc & 1;
+ pi->bExecutable = !(desc & 1);
pi->bGlobal = !(desc >> 11);
pi->bShared = (desc >> 10) & 1;
+ pi->AP = ((desc >> 4) & 3) | (((desc >> 9) & 1) << 2);
return 0;
}
return 1;
pi->PhysAddr |= (Uint64)((desc >> 20) & 0xF) << 32;
pi->PhysAddr |= (Uint64)((desc >> 5) & 0x7) << 36;
pi->Size = 24;
- pi->Domain = 0; // Superpages default to zero
+ pi->Domain = 0; // Supersections default to zero
+ pi->AP = ((desc >> 10) & 3) | (((desc >> 15) & 1) << 2);
return 0;
}
pi->PhysAddr = desc & 0xFFF80000;
pi->Size = 20;
pi->Domain = (desc >> 5) & 7;
+ pi->AP = ((desc >> 10) & 3) | (((desc >> 15) & 1) << 2);
return 0;
// 3: Reserved (invalid)
switch(pi.AP)
{
+ case 0:
+ break;
case AP_KRW_ONLY:
ret |= MM_PFLAG_KERNEL;
break;
case AP_RW_BOTH:
break;
case AP_RO_BOTH:
+ ret |= MM_PFLAG_COW;
+ break;
+ case AP_RO_USER:
ret |= MM_PFLAG_RO;
break;
}
void MM_SetFlags(tVAddr VAddr, Uint Flags, Uint Mask)
{
tMM_PageInfo pi;
+ Uint curFlags;
+
if( MM_int_GetPageInfo(VAddr, &pi) )
- return;
+ return ;
+
+ curFlags = MM_GetPhysAddr(VAddr);
+ if( (curFlags & Mask) == Flags )
+ return ;
+ curFlags &= ~Mask;
+ curFlags |= Flags;
+
+ if( curFlags & MM_PFLAG_COW )
+ pi.AP = AP_RO_BOTH;
+ else
+ {
+ switch(curFlags & (MM_PFLAG_KERNEL|MM_PFLAG_RO) )
+ {
+ case 0:
+ pi.AP = AP_RW_BOTH; break;
+ case MM_PFLAG_KERNEL:
+ pi.AP = AP_KRW_ONLY; break;
+ case MM_PFLAG_RO:
+ pi.AP = AP_RO_USER; break;
+ case MM_PFLAG_KERNEL|MM_PFLAG_RO:
+ pi.AP = AP_KRO_ONLY; break;
+ }
+ }
+
+ pi.bExecutable = !!(curFlags & MM_PFLAG_EXEC);
+
+ MM_int_SetPageInfo(VAddr, &pi);
}
int MM_Map(tVAddr VAddr, tPAddr PAddr)
{
tMM_PageInfo pi = {0};
+// Log("MM_Map %P=>%p", PAddr, VAddr);
+
pi.PhysAddr = PAddr;
pi.Size = 12;
- pi.AP = AP_KRW_ONLY; // Kernel Read/Write
+ if(VAddr < USER_STACK_TOP)
+ pi.AP = AP_RW_BOTH;
+ else
+ pi.AP = AP_KRW_ONLY; // Kernel Read/Write
pi.bExecutable = 1;
if( MM_int_SetPageInfo(VAddr, &pi) ) {
MM_DerefPhys(pi.PhysAddr);
pi.PhysAddr = MM_AllocPhys();
if( pi.PhysAddr == 0 ) LEAVE_RET('i', 0);
pi.Size = 12;
- pi.AP = AP_KRW_ONLY; // Kernel Read/Write
+ if(VAddr < USER_STACK_TOP)
+ pi.AP = AP_RW_BOTH;
+ else
+ pi.AP = AP_KRW_ONLY;
pi.bExecutable = 1;
if( MM_int_SetPageInfo(VAddr, &pi) ) {
MM_DerefPhys(pi.PhysAddr);
return pi.PhysAddr;
}
+tPAddr MM_AllocateZero(tVAddr VAddr)
+{
+ if( !giMM_ZeroPage ) {
+ giMM_ZeroPage = MM_Allocate(VAddr);
+ MM_RefPhys(giMM_ZeroPage);
+ memset((void*)VAddr, 0, PAGE_SIZE);
+ }
+ else {
+ MM_RefPhys(giMM_ZeroPage);
+ MM_Map(VAddr, giMM_ZeroPage);
+ }
+ MM_SetFlags(VAddr, MM_PFLAG_COW, MM_PFLAG_COW);
+ return giMM_ZeroPage;
+}
+
void MM_Deallocate(tVAddr VAddr)
{
tMM_PageInfo pi;
MM_int_SetPageInfo(VAddr, &pi);
}
+tPAddr MM_AllocateRootTable(void)
+{
+ tPAddr ret;
+
+ ret = MM_AllocPhysRange(2, -1);
+ if( ret & 0x1000 ) {
+ MM_DerefPhys(ret);
+ MM_DerefPhys(ret+0x1000);
+ ret = MM_AllocPhysRange(3, -1);
+ if( ret & 0x1000 ) {
+ MM_DerefPhys(ret);
+ ret += 0x1000;
+// Log("MM_AllocateRootTable: Second try not aligned, %P", ret);
+ }
+ else {
+ MM_DerefPhys(ret + 0x2000);
+// Log("MM_AllocateRootTable: Second try aligned, %P", ret);
+ }
+ }
+// else
+// Log("MM_AllocateRootTable: Got it in one, %P", ret);
+ return ret;
+}
+
+void MM_int_CloneTable(Uint32 *DestEnt, int Table)
+{
+ tPAddr table;
+ Uint32 *tmp_map;
+ Uint32 *cur = (void*)MM_TABLE0USER;
+// Uint32 *cur = &FRACTAL(MM_TABLE1USER,0);
+ int i;
+
+ table = MM_AllocPhys();
+ if(!table) return ;
+
+ tmp_map = (void*)MM_MapTemp(table);
+
+ for( i = 0; i < 1024; i ++ )
+ {
+ switch(cur[i] & 3)
+ {
+ case 0: tmp_map[i] = 0; break;
+ case 1:
+ tmp_map[i] = 0;
+ Log_Error("MMVirt", "TODO: Support large pages in MM_int_CloneTable");
+ // Large page?
+ break;
+ case 2:
+ case 3:
+ // Small page
+ // - If full RW
+ if( (cur[Table*256] & 0x230) == 0x030 )
+ cur[Table*256+i] |= 0x200; // Set to full RO (Full RO=COW, User RO = RO)
+ tmp_map[i] = cur[Table*256+i];
+ break;
+ }
+ }
+
+ DestEnt[0] = table + 0*0x400 + 1;
+ DestEnt[1] = table + 1*0x400 + 1;
+ DestEnt[2] = table + 2*0x400 + 1;
+ DestEnt[3] = table + 3*0x400 + 1;
+}
+
+tPAddr MM_Clone(void)
+{
+ tPAddr ret;
+ Uint32 *new_lvl1_1, *new_lvl1_2, *cur;
+ Uint32 *tmp_map;
+ int i;
+
+ ret = MM_AllocateRootTable();
+
+ cur = (void*)MM_TABLE0USER;
+ new_lvl1_1 = (void*)MM_MapTemp(ret);
+ new_lvl1_2 = (void*)MM_MapTemp(ret+0x1000);
+ tmp_map = new_lvl1_1;
+ for( i = 0; i < 0x800-4; i ++ )
+ {
+// Log("i = %i", i);
+ if( i == 0x400 )
+ tmp_map = &new_lvl1_2[-0x400];
+ switch( cur[i] & 3 )
+ {
+ case 0: tmp_map[i] = 0; break;
+ case 1:
+ MM_int_CloneTable(&tmp_map[i], i);
+ i += 3; // Tables are alocated in blocks of 4
+ break;
+ case 2:
+ case 3:
+ Log_Error("MMVirt", "TODO: Support Sections/Supersections in MM_Clone (i=%i)", i);
+ tmp_map[i] = 0;
+ break;
+ }
+ }
+
+ // Allocate Fractal table
+ {
+ int j, num;
+ tPAddr tmp = MM_AllocPhys();
+ Uint32 *table = (void*)MM_MapTemp(tmp);
+ Uint32 sp;
+ register Uint32 __SP asm("sp");
+
+ // Map table to last 4MiB of user space
+ new_lvl1_2[0x3FC] = tmp + 0*0x400 + 1;
+ new_lvl1_2[0x3FD] = tmp + 1*0x400 + 1;
+ new_lvl1_2[0x3FE] = tmp + 2*0x400 + 1;
+ new_lvl1_2[0x3FF] = tmp + 3*0x400 + 1;
+
+ tmp_map = new_lvl1_1;
+ for( j = 0; j < 512; j ++ )
+ {
+ if( j == 256 )
+ tmp_map = &new_lvl1_2[-0x400];
+ if( (tmp_map[j*4] & 3) == 1 )
+ {
+ table[j] = tmp_map[j*4] & PADDR_MASK_LVL1;// 0xFFFFFC00;
+ table[j] |= 0x813; // nG, Kernel Only, Small page, XN
+ }
+ else
+ table[j] = 0;
+ }
+ // Fractal
+ table[j++] = (ret + 0x0000) | 0x813;
+ table[j++] = (ret + 0x1000) | 0x813;
+ // Nuke the rest
+ for( ; j < 1024; j ++ )
+ table[j] = 0;
+
+ // Get kernel stack bottom
+ sp = __SP & ~(MM_KSTACK_SIZE-1);
+ j = (sp / 0x1000) % 1024;
+ num = MM_KSTACK_SIZE/0x1000;
+
+ // Copy stack pages
+ for(; num--; j ++, sp += 0x1000)
+ {
+ tVAddr page;
+ void *tmp_page;
+
+ page = MM_AllocPhys();
+ table[j] = page | 0x813;
+
+ tmp_page = (void*)MM_MapTemp(page);
+ memcpy(tmp_page, (void*)sp, 0x1000);
+ MM_FreeTemp( (tVAddr) tmp_page );
+ }
+
+ MM_FreeTemp( (tVAddr)table );
+ }
+
+ MM_FreeTemp( (tVAddr)new_lvl1_1 );
+ MM_FreeTemp( (tVAddr)new_lvl1_2 );
+
+ return ret;
+}
+
tPAddr MM_ClearUser(void)
{
// TODO: Implement ClearUser
tVAddr MM_MapTemp(tPAddr PAddr)
{
- // TODO: Implement MapTemp
+ tVAddr ret;
+ tMM_PageInfo pi;
+
+ for( ret = MM_TMPMAP_BASE; ret < MM_TMPMAP_END - PAGE_SIZE; ret += PAGE_SIZE )
+ {
+ if( MM_int_GetPageInfo(ret, &pi) == 0 )
+ continue;
+
+// Log("MapTemp %P at %p", PAddr, ret);
+ MM_RefPhys(PAddr); // Counter the MM_Deallocate in FreeTemp
+ MM_Map(ret, PAddr);
+
+ return ret;
+ }
+ Log_Warning("MMVirt", "MM_MapTemp: All slots taken");
return 0;
}
void MM_FreeTemp(tVAddr VAddr)
{
// TODO: Implement FreeTemp
+ if( VAddr < MM_TMPMAP_BASE || VAddr >= MM_TMPMAP_END ) {
+ Log_Warning("MMVirt", "MM_FreeTemp: Passed an addr not from MM_MapTemp (%p)", VAddr);
+ return ;
+ }
+
+ MM_Deallocate(VAddr);
+}
+
+tVAddr MM_MapHWPages(tPAddr PAddr, Uint NPages)
+{
+ tVAddr ret;
+ int i;
+ tMM_PageInfo pi;
+
+ ENTER("xPAddr iNPages", PAddr, NPages);
+
+ // Scan for a location
+ for( ret = MM_HWMAP_BASE; ret < MM_HWMAP_END - NPages * PAGE_SIZE; ret += PAGE_SIZE )
+ {
+// LOG("checking %p", ret);
+ // Check if there is `NPages` free pages
+ for( i = 0; i < NPages; i ++ )
+ {
+ if( MM_int_GetPageInfo(ret + i*PAGE_SIZE, &pi) == 0 )
+ break;
+ }
+ // Nope, jump to after the used page found and try again
+// LOG("i = %i, ==? %i", i, NPages);
+ if( i != NPages ) {
+ ret += i * PAGE_SIZE;
+ continue ;
+ }
+
+ // Map the pages
+ for( i = 0; i < NPages; i ++ )
+ MM_Map(ret+i*PAGE_SIZE, PAddr+i*PAddr);
+ // and return
+ LEAVE('p', ret);
+ return ret;
+ }
+ Log_Warning("MMVirt", "MM_MapHWPages: No space for a %i page block", NPages);
+ LEAVE('p', 0);
+ return 0;
+}
+
+tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PAddr)
+{
+ Log_Error("MMVirt", "TODO: Implement MM_AllocDMA");
+ return 0;
+}
+
+void MM_UnmapHWPages(tVAddr Vaddr, Uint Number)
+{
+ Log_Error("MMVirt", "TODO: Implement MM_UnmapHWPages");
}
tVAddr MM_NewKStack(int bShared)
// 1 guard page
for( ofs = PAGE_SIZE; ofs < MM_KSTACK_SIZE; ofs += PAGE_SIZE )
{
- if( MM_Allocate(addr + ofs) == 0 ) {
+ if( MM_Allocate(addr + ofs) == 0 )
+ {
while(ofs)
{
ofs -= PAGE_SIZE;
return addr + ofs;
}
+tVAddr MM_NewUserStack(void)
+{
+ tVAddr addr, ofs;
+
+ addr = USER_STACK_TOP - USER_STACK_SIZE;
+ if( MM_GetPhysAddr(addr + PAGE_SIZE) ) {
+ Log_Error("MMVirt", "Unable to create initial user stack, addr %p taken",
+ addr + PAGE_SIZE
+ );
+ return 0;
+ }
+
+ // 1 guard page
+ for( ofs = PAGE_SIZE; ofs < USER_STACK_SIZE; ofs += PAGE_SIZE )
+ {
+ tPAddr rv;
+ if(ofs >= USER_STACK_SIZE - USER_STACK_COMM)
+ rv = MM_Allocate(addr + ofs);
+ else
+ rv = MM_AllocateZero(addr + ofs);
+ if(rv == 0)
+ {
+ while(ofs)
+ {
+ ofs -= PAGE_SIZE;
+ MM_Deallocate(addr + ofs);
+ }
+ Log_Warning("MMVirt", "MM_NewUserStack: Unable to allocate");
+ return 0;
+ }
+ MM_SetFlags(addr+ofs, 0, MM_PFLAG_KERNEL);
+ }
+ Log("Return %p", addr + ofs);
+ MM_DumpTables(0, 0x80000000);
+ return addr + ofs;
+}
+
+void MM_int_DumpTableEnt(tVAddr Start, size_t Len, tMM_PageInfo *Info)
+{
+ if( giMM_ZeroPage && Info->PhysAddr == giMM_ZeroPage )
+ {
+ Log("%p => %8s - 0x%7x %i %x",
+ Start, "ZERO", Len,
+ Info->Domain, Info->AP
+ );
+ }
+ else
+ {
+ Log("%p => %8x - 0x%7x %i %x",
+ Start, Info->PhysAddr-Len, Len,
+ Info->Domain, Info->AP
+ );
+ }
+}
+
void MM_DumpTables(tVAddr Start, tVAddr End)
{
+ tVAddr range_start = 0, addr;
+ tMM_PageInfo pi, pi_old;
+ int i = 0, inRange=0;
+ pi_old.Size = 0;
+
+ Log("Page Table Dump:");
+ range_start = Start;
+ for( addr = Start; i == 0 || (addr && addr < End); i = 1 )
+ {
+// Log("addr = %p", addr);
+ int rv = MM_int_GetPageInfo(addr, &pi);
+ if( rv
+ || pi.Size != pi_old.Size
+ || pi.Domain != pi_old.Domain
+ || pi.AP != pi_old.AP
+ || pi_old.PhysAddr != pi.PhysAddr )
+ {
+ if(inRange) {
+ MM_int_DumpTableEnt(range_start, addr - range_start, &pi_old);
+ }
+ addr &= ~((1 << pi.Size)-1);
+ range_start = addr;
+ }
+
+ pi_old = pi;
+ // Handle the zero page
+ if( !giMM_ZeroPage || pi_old.Size != 12 || pi_old.PhysAddr != giMM_ZeroPage )
+ pi_old.PhysAddr += 1 << pi_old.Size;
+ addr += 1 << pi_old.Size;
+ inRange = (rv == 0);
+ }
+ if(inRange)
+ MM_int_DumpTableEnt(range_start, addr - range_start, &pi);
+ Log("Done");
}
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