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arm64: assembler: Align phys_to_pte with pte_to_phys 

pte_to_phys lives in assembler.h and takes its destination register as
the first argument. Move phys_to_pte out of head.S to sit with its
counterpart and rejig it to follow the same calling convention.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Will Deacon 2018-01-29 11:59:59 +00:00 committed by Catalin Marinas
parent f167211a93
commit 79ddab3b05
2 changed files with 15 additions and 22 deletions
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13
arch/arm64/include/asm/assembler.h
View File

@ -523,6 +523,19 @@ alternative_endif
#endif
.endm
.macro phys_to_pte, pte, phys
#ifdef CONFIG_ARM64_PA_BITS_52
/*
* We assume \phys is 64K aligned and this is guaranteed by only
* supporting this configuration with 64K pages.
*/
orr \pte, \phys, \phys, lsr #36
and \pte, \pte, #PTE_ADDR_MASK
#else
mov \pte, \phys
#endif
.endm
.macro pte_to_phys, phys, pte
#ifdef CONFIG_ARM64_PA_BITS_52
ubfiz \phys, \pte, #(48 - 16 - 12), #16

24
arch/arm64/kernel/head.S
View File

@ -147,26 +147,6 @@ preserve_boot_args:
b __inval_dcache_area // tail call
ENDPROC(preserve_boot_args)
/*
* Macro to arrange a physical address in a page table entry, taking care of
* 52-bit addresses.
*
* Preserves: phys
* Returns: pte
*/
.macro phys_to_pte, phys, pte
#ifdef CONFIG_ARM64_PA_BITS_52
/*
* We assume \phys is 64K aligned and this is guaranteed by only
* supporting this configuration with 64K pages.
*/
orr \pte, \phys, \phys, lsr #36
and \pte, \pte, #PTE_ADDR_MASK
#else
mov \pte, \phys
#endif
.endm
/*
* Macro to create a table entry to the next page.
*
@ -181,7 +161,7 @@ ENDPROC(preserve_boot_args)
*/
.macro create_table_entry, tbl, virt, shift, ptrs, tmp1, tmp2
add \tmp1, \tbl, #PAGE_SIZE
phys_to_pte \tmp1, \tmp2
phys_to_pte \tmp2, \tmp1
orr \tmp2, \tmp2, #PMD_TYPE_TABLE // address of next table and entry type
lsr \tmp1, \virt, #\shift
sub \ptrs, \ptrs, #1
@ -207,7 +187,7 @@ ENDPROC(preserve_boot_args)
* Returns: rtbl
*/
.macro populate_entries, tbl, rtbl, index, eindex, flags, inc, tmp1
.Lpe\@: phys_to_pte \rtbl, \tmp1
.Lpe\@: phys_to_pte \tmp1, \rtbl
orr \tmp1, \tmp1, \flags // tmp1 = table entry
str \tmp1, [\tbl, \index, lsl #3]
add \rtbl, \rtbl, \inc // rtbl = pa next level