ARMv8: Adjust MMU setup
Make MMU function reusable. Platform code can setup its own MMU tables.
Signed-off-by: York Sun <yorksun@freescale.com>
CC: David Feng <fenghua@phytium.com.cn>
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
index a96ecda..af3c494 100644
--- a/arch/arm/cpu/armv8/cache_v8.c
+++ b/arch/arm/cpu/armv8/cache_v8.c
@@ -12,15 +12,14 @@
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SYS_DCACHE_OFF
-
-static void set_pgtable_section(u64 section, u64 memory_type)
+void set_pgtable_section(u64 *page_table, u64 index, u64 section,
+ u64 memory_type)
{
- u64 *page_table = (u64 *)gd->arch.tlb_addr;
u64 value;
- value = (section << SECTION_SHIFT) | PMD_TYPE_SECT | PMD_SECT_AF;
+ value = section | PMD_TYPE_SECT | PMD_SECT_AF;
value |= PMD_ATTRINDX(memory_type);
- page_table[section] = value;
+ page_table[index] = value;
}
/* to activate the MMU we need to set up virtual memory */
@@ -28,10 +27,13 @@
{
int i, j, el;
bd_t *bd = gd->bd;
+ u64 *page_table = (u64 *)gd->arch.tlb_addr;
/* Setup an identity-mapping for all spaces */
- for (i = 0; i < (PGTABLE_SIZE >> 3); i++)
- set_pgtable_section(i, MT_DEVICE_NGNRNE);
+ for (i = 0; i < (PGTABLE_SIZE >> 3); i++) {
+ set_pgtable_section(page_table, i, i << SECTION_SHIFT,
+ MT_DEVICE_NGNRNE);
+ }
/* Setup an identity-mapping for all RAM space */
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
@@ -39,38 +41,26 @@
ulong end = bd->bi_dram[i].start + bd->bi_dram[i].size;
for (j = start >> SECTION_SHIFT;
j < end >> SECTION_SHIFT; j++) {
- set_pgtable_section(j, MT_NORMAL);
+ set_pgtable_section(page_table, j, j << SECTION_SHIFT,
+ MT_NORMAL);
}
}
/* load TTBR0 */
el = current_el();
if (el == 1) {
- asm volatile("msr ttbr0_el1, %0"
- : : "r" (gd->arch.tlb_addr) : "memory");
- asm volatile("msr tcr_el1, %0"
- : : "r" (TCR_FLAGS | TCR_EL1_IPS_BITS)
- : "memory");
- asm volatile("msr mair_el1, %0"
- : : "r" (MEMORY_ATTRIBUTES) : "memory");
+ set_ttbr_tcr_mair(el, gd->arch.tlb_addr,
+ TCR_FLAGS | TCR_EL1_IPS_BITS,
+ MEMORY_ATTRIBUTES);
} else if (el == 2) {
- asm volatile("msr ttbr0_el2, %0"
- : : "r" (gd->arch.tlb_addr) : "memory");
- asm volatile("msr tcr_el2, %0"
- : : "r" (TCR_FLAGS | TCR_EL2_IPS_BITS)
- : "memory");
- asm volatile("msr mair_el2, %0"
- : : "r" (MEMORY_ATTRIBUTES) : "memory");
+ set_ttbr_tcr_mair(el, gd->arch.tlb_addr,
+ TCR_FLAGS | TCR_EL2_IPS_BITS,
+ MEMORY_ATTRIBUTES);
} else {
- asm volatile("msr ttbr0_el3, %0"
- : : "r" (gd->arch.tlb_addr) : "memory");
- asm volatile("msr tcr_el3, %0"
- : : "r" (TCR_FLAGS | TCR_EL2_IPS_BITS)
- : "memory");
- asm volatile("msr mair_el3, %0"
- : : "r" (MEMORY_ATTRIBUTES) : "memory");
+ set_ttbr_tcr_mair(el, gd->arch.tlb_addr,
+ TCR_FLAGS | TCR_EL3_IPS_BITS,
+ MEMORY_ATTRIBUTES);
}
-
/* enable the mmu */
set_sctlr(get_sctlr() | CR_M);
}