@@ -523,6 +523,20 @@ 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
ror \phys, \pte, #16
@@ -148,26 +148,6 @@ preserve_boot_args:
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.
*
* tbl: page table address
@@ -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
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> --- arch/arm64/include/asm/assembler.h | 14 ++++++++++++++ arch/arm64/kernel/head.S | 24 ++---------------------- 2 files changed, 16 insertions(+), 22 deletions(-)