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memory: reformat and shorten MAIR_INDEX to MAIR_IDX

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-03-04 19:46:45 +09:00
parent acf1198fbb
commit 8e4b99d75a
1 changed files with 35 additions and 35 deletions
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38
src/memory.c
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@ -41,12 +41,12 @@ static inline void write_sctlr(u64 val)
* PTE_TYPE_BLOCK indicates that the page table entry (PTE) points to a physical memory block
* PTE_TYPE_TABLE indicates that the PTE points to another PTE
* PTE_FLAG_ACCESS is required to allow access to the memory region
* PTE_MAIR_INDEX sets the MAIR index to be used for this PTE
* PTE_MAIR_IDX sets the MAIR index to be used for this PTE
*/
#define PTE_TYPE_BLOCK 0b01
#define PTE_TYPE_TABLE 0b11
#define PTE_FLAG_ACCESS BIT(10)
#define PTE_MAIR_INDEX(i) ((i & 7) << 2)
#define PTE_MAIR_IDX(i) ((i & 7) << 2)
#define PTE_PXN BIT(53)
#define PTE_UXN BIT(54)
#define PTE_AP_RO BIT(7)
@ -103,13 +103,13 @@ static inline void write_sctlr(u64 val)
* contains a field to select one of these which will then be used
* to select the corresponding memory access flags from MAIR.
*/
#define MAIR_INDEX_NORMAL 0
#define MAIR_INDEX_DEVICE_nGnRnE 1
#define MAIR_INDEX_DEVICE_nGnRE 2
#define MAIR_IDX_NORMAL 0
#define MAIR_IDX_DEVICE_nGnRnE 1
#define MAIR_IDX_DEVICE_nGnRE 2
#define MAIR_SHIFT_NORMAL (MAIR_INDEX_NORMAL * 8)
#define MAIR_SHIFT_DEVICE_nGnRnE (MAIR_INDEX_DEVICE_nGnRnE * 8)
#define MAIR_SHIFT_DEVICE_nGnRE (MAIR_INDEX_DEVICE_nGnRE * 8)
#define MAIR_SHIFT_NORMAL (MAIR_IDX_NORMAL * 8)
#define MAIR_SHIFT_DEVICE_nGnRnE (MAIR_IDX_DEVICE_nGnRnE * 8)
#define MAIR_SHIFT_DEVICE_nGnRE (MAIR_IDX_DEVICE_nGnRE * 8)
/*
* https://developer.arm.com/documentation/ddi0500/e/system-control/aarch64-register-descriptions/memory-attribute-indirection-register--el1
@ -159,7 +159,7 @@ static u64 mmu_make_block_pte(uintptr_t addr, u8 attribute_index, u64 perms)
u64 pte = PTE_TYPE_BLOCK;
pte |= addr;
pte |= PTE_FLAG_ACCESS;
pte |= PTE_MAIR_INDEX(attribute_index);
pte |= PTE_MAIR_IDX(attribute_index);
pte |= perms;
return pte;
@ -278,30 +278,30 @@ static void mmu_add_default_mappings(void)
* create MMIO mappings. PCIe has to be mapped as nGnRE while MMIO needs nGnRnE.
* see https://lore.kernel.org/linux-arm-kernel/c1bc2a087747c4d9@bloch.sibelius.xs4all.nl/
*/
mmu_add_mapping(0x0200000000, 0x0200000000, 0x0200000000, MAIR_INDEX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0x0400000000, 0x0400000000, 0x0100000000, MAIR_INDEX_DEVICE_nGnRE, PERM_RW_EL0);
mmu_add_mapping(0x0500000000, 0x0500000000, 0x0080000000, MAIR_INDEX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0x0580000000, 0x0580000000, 0x0100000000, MAIR_INDEX_DEVICE_nGnRE, PERM_RW_EL0);
mmu_add_mapping(0x0680000000, 0x0680000000, 0x0020000000, MAIR_INDEX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0x06a0000000, 0x06a0000000, 0x0060000000, MAIR_INDEX_DEVICE_nGnRE, PERM_RW_EL0);
mmu_add_mapping(0x0200000000, 0x0200000000, 0x0200000000, MAIR_IDX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0x0400000000, 0x0400000000, 0x0100000000, MAIR_IDX_DEVICE_nGnRE, PERM_RW_EL0);
mmu_add_mapping(0x0500000000, 0x0500000000, 0x0080000000, MAIR_IDX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0x0580000000, 0x0580000000, 0x0100000000, MAIR_IDX_DEVICE_nGnRE, PERM_RW_EL0);
mmu_add_mapping(0x0680000000, 0x0680000000, 0x0020000000, MAIR_IDX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0x06a0000000, 0x06a0000000, 0x0060000000, MAIR_IDX_DEVICE_nGnRE, PERM_RW_EL0);
/*
* create identity mapping for 16GB RAM from 0x08_0000_0000 to
* 0x0c_0000_0000
*/
mmu_add_mapping(0x0800000000, 0x0800000000, 0x0400000000, MAIR_INDEX_NORMAL, PERM_RWX);
mmu_add_mapping(0x0800000000, 0x0800000000, 0x0400000000, MAIR_IDX_NORMAL, PERM_RWX);
/*
* create identity mapping for 16GB RAM from 0x88_0000_0000 to
* 0x8c_0000_0000, writable by EL0 (but not executable by EL2)
*/
mmu_add_mapping(0x8800000000, 0x0800000000, 0x0400000000, MAIR_INDEX_NORMAL, PERM_RWX_EL0);
mmu_add_mapping(0x8800000000, 0x0800000000, 0x0400000000, MAIR_IDX_NORMAL, PERM_RWX_EL0);
/*
* create two seperate nGnRnE and nGnRE full mappings of MMIO space
*/
mmu_add_mapping(0xe000000000, 0x0000000000, 0x0800000000, MAIR_INDEX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0xf000000000, 0x0000000000, 0x0800000000, MAIR_INDEX_DEVICE_nGnRE, PERM_RW_EL0);
mmu_add_mapping(0xe000000000, 0x0000000000, 0x0800000000, MAIR_IDX_DEVICE_nGnRnE, PERM_RW_EL0);
mmu_add_mapping(0xf000000000, 0x0000000000, 0x0800000000, MAIR_IDX_DEVICE_nGnRE, PERM_RW_EL0);
}
static void mmu_configure(void)