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Diffstat (limited to 'cpu/ppc4xx/tlb.c')
-rw-r--r--cpu/ppc4xx/tlb.c85
1 files changed, 52 insertions, 33 deletions
diff --git a/cpu/ppc4xx/tlb.c b/cpu/ppc4xx/tlb.c
index 50344a4..049a785 100644
--- a/cpu/ppc4xx/tlb.c
+++ b/cpu/ppc4xx/tlb.c
@@ -36,7 +36,8 @@ typedef struct region {
unsigned long tlb_word2_i_value;
} region_t;
-static int add_tlb_entry(unsigned long base_addr,
+static int add_tlb_entry(unsigned long phys_addr,
+ unsigned long virt_addr,
unsigned long tlb_word0_size_value,
unsigned long tlb_word2_i_value)
{
@@ -55,9 +56,9 @@ static int add_tlb_entry(unsigned long base_addr,
return -1;
/* Second, create the TLB entry */
- tlb_word0_value = TLB_WORD0_EPN_ENCODE(base_addr) | TLB_WORD0_V_ENABLE |
+ tlb_word0_value = TLB_WORD0_EPN_ENCODE(virt_addr) | TLB_WORD0_V_ENABLE |
TLB_WORD0_TS_0 | tlb_word0_size_value;
- tlb_word1_value = TLB_WORD1_RPN_ENCODE(base_addr) | TLB_WORD1_ERPN_ENCODE(0);
+ tlb_word1_value = TLB_WORD1_RPN_ENCODE(phys_addr) | TLB_WORD1_ERPN_ENCODE(0);
tlb_word2_value = TLB_WORD2_U0_DISABLE | TLB_WORD2_U1_DISABLE |
TLB_WORD2_U2_DISABLE | TLB_WORD2_U3_DISABLE |
TLB_WORD2_W_DISABLE | tlb_word2_i_value |
@@ -81,7 +82,9 @@ static int add_tlb_entry(unsigned long base_addr,
return 0;
}
-static void program_tlb_addr(unsigned long base_addr, unsigned long mem_size,
+static void program_tlb_addr(unsigned long phys_addr,
+ unsigned long virt_addr,
+ unsigned long mem_size,
unsigned long tlb_word2_i_value)
{
int rc;
@@ -91,70 +94,86 @@ static void program_tlb_addr(unsigned long base_addr, unsigned long mem_size,
while (mem_size != 0) {
rc = 0;
/* Add the TLB entries in to map the region. */
- if (((base_addr & TLB_256MB_ALIGN_MASK) == base_addr) &&
+ if (((phys_addr & TLB_256MB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_256MB_SIZE)) {
/* Add a 256MB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_256MB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_256MB, tlb_i)) == 0) {
mem_size -= TLB_256MB_SIZE;
- base_addr += TLB_256MB_SIZE;
+ phys_addr += TLB_256MB_SIZE;
+ virt_addr += TLB_256MB_SIZE;
}
- } else if (((base_addr & TLB_16MB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_16MB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_16MB_SIZE)) {
/* Add a 16MB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_16MB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_16MB, tlb_i)) == 0) {
mem_size -= TLB_16MB_SIZE;
- base_addr += TLB_16MB_SIZE;
+ phys_addr += TLB_16MB_SIZE;
+ virt_addr += TLB_16MB_SIZE;
}
- } else if (((base_addr & TLB_1MB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_1MB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_1MB_SIZE)) {
/* Add a 1MB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_1MB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_1MB, tlb_i)) == 0) {
mem_size -= TLB_1MB_SIZE;
- base_addr += TLB_1MB_SIZE;
+ phys_addr += TLB_1MB_SIZE;
+ virt_addr += TLB_1MB_SIZE;
}
- } else if (((base_addr & TLB_256KB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_256KB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_256KB_SIZE)) {
/* Add a 256KB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_256KB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_256KB, tlb_i)) == 0) {
mem_size -= TLB_256KB_SIZE;
- base_addr += TLB_256KB_SIZE;
+ phys_addr += TLB_256KB_SIZE;
+ virt_addr += TLB_256KB_SIZE;
}
- } else if (((base_addr & TLB_64KB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_64KB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_64KB_SIZE)) {
/* Add a 64KB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_64KB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_64KB, tlb_i)) == 0) {
mem_size -= TLB_64KB_SIZE;
- base_addr += TLB_64KB_SIZE;
+ phys_addr += TLB_64KB_SIZE;
+ virt_addr += TLB_64KB_SIZE;
}
- } else if (((base_addr & TLB_16KB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_16KB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_16KB_SIZE)) {
/* Add a 16KB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_16KB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_16KB, tlb_i)) == 0) {
mem_size -= TLB_16KB_SIZE;
- base_addr += TLB_16KB_SIZE;
+ phys_addr += TLB_16KB_SIZE;
+ virt_addr += TLB_16KB_SIZE;
}
- } else if (((base_addr & TLB_4KB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_4KB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_4KB_SIZE)) {
/* Add a 4KB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_4KB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_4KB, tlb_i)) == 0) {
mem_size -= TLB_4KB_SIZE;
- base_addr += TLB_4KB_SIZE;
+ phys_addr += TLB_4KB_SIZE;
+ virt_addr += TLB_4KB_SIZE;
}
- } else if (((base_addr & TLB_1KB_ALIGN_MASK) == base_addr) &&
+ } else if (((phys_addr & TLB_1KB_ALIGN_MASK) == phys_addr) &&
(mem_size >= TLB_1KB_SIZE)) {
/* Add a 1KB TLB entry */
- if ((rc = add_tlb_entry(base_addr, TLB_WORD0_SIZE_1KB, tlb_i)) == 0) {
+ if ((rc = add_tlb_entry(phys_addr, virt_addr,
+ TLB_WORD0_SIZE_1KB, tlb_i)) == 0) {
mem_size -= TLB_1KB_SIZE;
- base_addr += TLB_1KB_SIZE;
+ phys_addr += TLB_1KB_SIZE;
+ virt_addr += TLB_1KB_SIZE;
}
} else {
printf("ERROR: no TLB size exists for the base address 0x%0X.\n",
- base_addr);
+ phys_addr);
}
if (rc != 0)
printf("ERROR: no TLB entries available for the base addr 0x%0X.\n",
- base_addr);
+ phys_addr);
}
return;
@@ -166,16 +185,16 @@ static void program_tlb_addr(unsigned long base_addr, unsigned long mem_size,
* Common usage for boards with SDRAM DIMM modules to dynamically
* configure the TLB's for the SDRAM
*/
-void program_tlb(u32 start, u32 size, u32 tlb_word2_i_value)
+void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value)
{
region_t region_array;
- region_array.base = start;
+ region_array.base = phys_addr;
region_array.size = size;
region_array.tlb_word2_i_value = tlb_word2_i_value; /* en-/disable cache */
/* Call the routine to add in the tlb entries for the memory regions */
- program_tlb_addr(region_array.base, region_array.size,
+ program_tlb_addr(region_array.base, virt_addr, region_array.size,
region_array.tlb_word2_i_value);
return;
generated by cgit v1.1 at 2024-11-17 06:03:25 +0000