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arch/arm64: update mmu translation table granule size, logic and macros 

1. change mmu granule size from 64KB to 4KB
2. correct level 1 translation table creation logic
3. automatically calculate granule size related macros

BRANCH=none
BUG=none
TEST=boot to kernel on oak board

Change-Id: I9e99a3017033f6870b1735ac8faabb267c7be0a4
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 2f18c4d5d9902f2830db82720c5543af270a7e3c
Original-Change-Id: Ia27a414ab7578d70b00c36f9c063983397ba7927
Original-Signed-off-by: Jimmy Huang <jimmy.huang@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/265603
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-on: http://review.coreboot.org/10009
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
This commit is contained in:
Jimmy Huang 2015-04-13 20:28:38 +08:00 committed by Patrick Georgi
parent 16fb9b9f81
commit dea4597bd4
2 changed files with 40 additions and 51 deletions
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33
src/arch/arm64/armv8/mmu.c
View File

@ -164,20 +164,33 @@ static uint64_t init_xlat_table(uint64_t base_addr,
uint64_t attr = get_block_attr(tag); uint64_t attr = get_block_attr(tag);
/* L1 table lookup */ /* L1 table lookup */
/* If VA has bits more than 41, lookup starts at L1 */ /* If VA has bits more than L2 can resolve, lookup starts at L1
if (l1_index) { Assumption: we don't need L0 table in coreboot */
table = get_next_level_table(&table[l1_index]); if (BITS_PER_VA > L1_ADDR_SHIFT) {
if (!table) if ((size >= L1_XLAT_SIZE) &&
return 0; IS_ALIGNED(base_addr, (1UL << L1_ADDR_SHIFT))) {
/* If block address is aligned and size is greater than
* or equal to size addressed by each L1 entry, we can
* directly store a block desc */
desc = base_addr | BLOCK_DESC | attr;
table[l1_index] = desc;
/* L2 lookup is not required */
return L1_XLAT_SIZE;
} else {
table = get_next_level_table(&table[l1_index]);
if (!table)
return 0;
}
} }
/* L2 table lookup */ /* L2 table lookup */
/* If lookup was performed at L1, L2 table addr is obtained from L1 desc /* If lookup was performed at L1, L2 table addr is obtained from L1 desc
else, lookup starts at ttbr address */ else, lookup starts at ttbr address */
if (!l3_index && (size >= L2_XLAT_SIZE)) { if ((size >= L2_XLAT_SIZE) &&
/* If block address is aligned and size is greater than or equal IS_ALIGNED(base_addr, (1UL << L2_ADDR_SHIFT))) {
to 512MiB i.e. size addressed by each L2 entry, we can /* If block address is aligned and size is greater than
directly store a block desc */ * or equal to size addressed by each L2 entry, we can
* directly store a block desc */
desc = base_addr | BLOCK_DESC | attr; desc = base_addr | BLOCK_DESC | attr;
table[l2_index] = desc; table[l2_index] = desc;
/* L3 lookup is not required */ /* L3 lookup is not required */
@ -279,7 +292,7 @@ void mmu_enable(void)
/* Initialize TCR flags */ /* Initialize TCR flags */
raw_write_tcr_el3(TCR_TOSZ | TCR_IRGN0_NM_WBWAC | TCR_ORGN0_NM_WBWAC | raw_write_tcr_el3(TCR_TOSZ | TCR_IRGN0_NM_WBWAC | TCR_ORGN0_NM_WBWAC |
TCR_SH0_IS | TCR_TG0_64KB | TCR_PS_64GB | TCR_SH0_IS | TCR_TG0_4KB | TCR_PS_64GB |
TCR_TBI_USED); TCR_TBI_USED);
/* Initialize TTBR */ /* Initialize TTBR */

58
src/arch/arm64/include/armv8/arch/mmu.h
View File

@ -22,15 +22,6 @@
#include <memrange.h> #include <memrange.h>
/* IMPORTANT!!!!!!!
* Assumptions made:
* Granule size is 64KiB
* BITS per Virtual address is 33
* All the calculations for tables L1,L2 and L3 are based on these assumptions
* If these values are changed, recalculate the other macros as well
*/
/* Memory attributes for mmap regions /* Memory attributes for mmap regions
* These attributes act as tag values for memrange regions * These attributes act as tag values for memrange regions
*/ */
@ -74,46 +65,31 @@
/* XLAT Table Init Attributes */ /* XLAT Table Init Attributes */
#define VA_START 0x0 #define VA_START 0x0
/* If BITS_PER_VA or GRANULE_SIZE are changed, recalculate and change the
macros following them */
#define BITS_PER_VA 33 #define BITS_PER_VA 33
/* Granule size of 64KB is being used */ /* Granule size of 4KB is being used */
#define GRANULE_SIZE_SHIFT 16 #define GRANULE_SIZE_SHIFT 12
#define GRANULE_SIZE (1 << GRANULE_SIZE_SHIFT) #define GRANULE_SIZE (1 << GRANULE_SIZE_SHIFT)
#define XLAT_TABLE_MASK ~(0xffffUL) #define XLAT_TABLE_MASK (~(0UL) << GRANULE_SIZE_SHIFT)
#define GRANULE_SIZE_MASK ((1 << 16) - 1) #define GRANULE_SIZE_MASK ((1 << GRANULE_SIZE_SHIFT) - 1)
#define L1_ADDR_SHIFT 42 #define BITS_RESOLVED_PER_LVL (GRANULE_SIZE_SHIFT - 3)
#define L2_ADDR_SHIFT 29 #define L1_ADDR_SHIFT (GRANULE_SIZE_SHIFT + BITS_RESOLVED_PER_LVL * 2)
#define L3_ADDR_SHIFT 16 #define L2_ADDR_SHIFT (GRANULE_SIZE_SHIFT + BITS_RESOLVED_PER_LVL * 1)
#define L3_ADDR_SHIFT (GRANULE_SIZE_SHIFT + BITS_RESOLVED_PER_LVL * 0)
#define L1_ADDR_MASK (0UL << L1_ADDR_SHIFT) #if BITS_PER_VA > L1_ADDR_SHIFT + BITS_RESOLVED_PER_LVL
#define L2_ADDR_MASK (0xfUL << L2_ADDR_SHIFT) #error "BITS_PER_VA too large (we don't have L0 table support)"
#define L3_ADDR_MASK (0x1fffUL << L3_ADDR_SHIFT) #endif
/* Dependent on BITS_PER_VA and GRANULE_SIZE */ #define L1_ADDR_MASK (((1UL << BITS_RESOLVED_PER_LVL) - 1) << L1_ADDR_SHIFT)
#define INIT_LEVEL 2 #define L2_ADDR_MASK (((1UL << BITS_RESOLVED_PER_LVL) - 1) << L2_ADDR_SHIFT)
#define XLAT_MAX_LEVEL 3 #define L3_ADDR_MASK (((1UL << BITS_RESOLVED_PER_LVL) - 1) << L3_ADDR_SHIFT)
/* Each entry in XLAT table is 8 bytes */
#define XLAT_ENTRY_SHIFT 3
#define XLAT_ENTRY_SIZE (1 << XLAT_ENTRY_SHIFT)
#define XLAT_TABLE_SHIFT GRANULE_SIZE_SHIFT
#define XLAT_TABLE_SIZE (1 << XLAT_TABLE_SHIFT)
#define XLAT_NUM_ENTRIES_SHIFT (XLAT_TABLE_SHIFT - XLAT_ENTRY_SHIFT)
#define XLAT_NUM_ENTRIES (1 << XLAT_NUM_ENTRIES_SHIFT)
#define L3_XLAT_SIZE_SHIFT (GRANULE_SIZE_SHIFT)
#define L2_XLAT_SIZE_SHIFT (GRANULE_SIZE_SHIFT + XLAT_NUM_ENTRIES_SHIFT)
#define L1_XLAT_SIZE_SHIFT (GRANULE_SIZE_SHIFT + XLAT_NUM_ENTRIES_SHIFT)
/* These macros give the size of the region addressed by each entry of a xlat /* These macros give the size of the region addressed by each entry of a xlat
table at any given level */ table at any given level */
#define L3_XLAT_SIZE (1 << L3_XLAT_SIZE_SHIFT) #define L3_XLAT_SIZE (1UL << L3_ADDR_SHIFT)
#define L2_XLAT_SIZE (1 << L2_XLAT_SIZE_SHIFT) #define L2_XLAT_SIZE (1UL << L2_ADDR_SHIFT)
#define L1_XLAT_SIZE (1 << L1_XLAT_SIZE_SHIFT) #define L1_XLAT_SIZE (1UL << L1_ADDR_SHIFT)
/* Block indices required for MAIR */ /* Block indices required for MAIR */
#define BLOCK_INDEX_MEM_DEV_NGNRNE 0 #define BLOCK_INDEX_MEM_DEV_NGNRNE 0