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| author | andrew <andrew@FreeBSD.org> | 2016-04-06 14:12:00 +0000 |
|---|---|---|
| committer | andrew <andrew@FreeBSD.org> | 2016-04-06 14:12:00 +0000 |
| commit | c287d03447df3c2a6e83106c8fa7f3c78897b008 (patch) | |
| tree | f1bf9dd9c77fce9f3f4bb7fa9f6f536f7cc5e3b1 /sys/arm64 | |
| parent | d532565c6da2dee9fa355e47534a76d44af6b7b1 (diff) | |
| download | FreeBSD-src-c287d03447df3c2a6e83106c8fa7f3c78897b008.zip FreeBSD-src-c287d03447df3c2a6e83106c8fa7f3c78897b008.tar.gz | |
Cleanup the early pagetable creation code in preperation for increasing
the size of the arm64 DMAP region.
Approved by: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'sys/arm64')
| -rw-r--r-- | sys/arm64/arm64/locore.S | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/sys/arm64/arm64/locore.S b/sys/arm64/arm64/locore.S index 615b2e1..ca57cfc 100644 --- a/sys/arm64/arm64/locore.S +++ b/sys/arm64/arm64/locore.S @@ -378,6 +378,7 @@ create_pagetables: /* Link the l0 -> l1 table */ mov x9, x6 mov x6, x24 + mov x10, #1 bl link_l0_pagetable /* @@ -408,6 +409,7 @@ create_pagetables: /* Link the l0 -> l1 table */ mov x9, x6 mov x6, x27 + mov x10, #1 bl link_l0_pagetable /* Restore the Link register */ @@ -423,6 +425,7 @@ create_pagetables: * x6 = L0 table * x8 = Virtual Address * x9 = L1 PA (trashed) + * x10 = Entry count * x11, x12 and x13 are trashed */ link_l0_pagetable: @@ -437,11 +440,16 @@ link_l0_pagetable: mov x12, #L0_TABLE /* Only use the output address bits */ - lsr x9, x9, #12 - orr x12, x12, x9, lsl #12 + lsr x9, x9, #PAGE_SHIFT +1: orr x13, x12, x9, lsl #PAGE_SHIFT /* Store the entry */ - str x12, [x6, x11, lsl #3] + str x13, [x6, x11, lsl #3] + + sub x10, x10, #1 + add x11, x11, #1 + add x9, x9, #1 + cbnz x10, 1b ret @@ -468,11 +476,11 @@ link_l1_pagetable: mov x12, #L1_TABLE /* Only use the output address bits */ - lsr x9, x9, #12 - orr x12, x12, x9, lsl #12 + lsr x9, x9, #PAGE_SHIFT + orr x13, x12, x9, lsl #PAGE_SHIFT /* Store the entry */ - str x12, [x6, x11, lsl #3] + str x13, [x6, x11, lsl #3] ret @@ -482,7 +490,7 @@ link_l1_pagetable: * x7 = Type (0 = Device, 1 = Normal) * x8 = VA start * x9 = PA start (trashed) - * x10 = Entry count (TODO) + * x10 = Entry count * x11, x12 and x13 are trashed */ build_l1_block_pagetable: @@ -505,20 +513,17 @@ build_l1_block_pagetable: lsr x9, x9, #L1_SHIFT /* Set the physical address for this virtual address */ -1: orr x12, x12, x9, lsl #L1_SHIFT +1: orr x13, x12, x9, lsl #L1_SHIFT /* Store the entry */ - str x12, [x6, x11, lsl #3] - - /* Clear the address bits */ - and x12, x12, #ATTR_MASK_L + str x13, [x6, x11, lsl #3] sub x10, x10, #1 add x11, x11, #1 add x9, x9, #1 cbnz x10, 1b -2: ret + ret /* * Builds count 2 MiB page table entry @@ -526,7 +531,7 @@ build_l1_block_pagetable: * x7 = Type (0 = Device, 1 = Normal) * x8 = VA start * x9 = PA start (trashed) - * x10 = Entry count (TODO) + * x10 = Entry count * x11, x12 and x13 are trashed */ build_l2_block_pagetable: @@ -549,20 +554,17 @@ build_l2_block_pagetable: lsr x9, x9, #L2_SHIFT /* Set the physical address for this virtual address */ -1: orr x12, x12, x9, lsl #L2_SHIFT +1: orr x13, x12, x9, lsl #L2_SHIFT /* Store the entry */ - str x12, [x6, x11, lsl #3] - - /* Clear the address bits */ - and x12, x12, #ATTR_MASK_L + str x13, [x6, x11, lsl #3] sub x10, x10, #1 add x11, x11, #1 add x9, x9, #1 cbnz x10, 1b -2: ret + ret start_mmu: dsb sy |
