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arm64: Update the TCR_EL1 translation granule definitions for 16K pages

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The current TCR register setting in arch/arm64/mm/proc.S assumes that
TCR_EL1.TG* fields are one bit wide and bit 31 is RES1 (reserved, set to
1). With the addition of 16K pages (currently unsupported in the
kernel), the TCR_EL1.TG* fields have been extended to two bits. This
patch updates the corresponding Linux definitions and drops the bit 31
setting in proc.S in favour of the new macros.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Joe Sylve <joe.sylve@gmail.com>
This commit is contained in:
Catalin Marinas 2014-04-02 17:55:40 +01:00
parent 33648de0b6
commit 35a8697692
2 changed files with 19 additions and 12 deletions
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6
arch/arm64/include/asm/pgtable-hwdef.h
View File

@ -120,8 +120,12 @@
#define TCR_ORGN_WBnWA ((UL(3) << 10) | (UL(3) << 26))
#define TCR_ORGN_MASK ((UL(3) << 10) | (UL(3) << 26))
#define TCR_SHARED ((UL(3) << 12) | (UL(3) << 28))
#define TCR_TG0_4K (UL(0) << 14)
#define TCR_TG0_64K (UL(1) << 14)
#define TCR_TG1_64K (UL(1) << 30)
#define TCR_TG0_16K (UL(2) << 14)
#define TCR_TG1_16K (UL(1) << 30)
#define TCR_TG1_4K (UL(2) << 30)
#define TCR_TG1_64K (UL(3) << 30)
#define TCR_ASID16 (UL(1) << 36)
#define TCR_TBI0 (UL(1) << 37)

25
arch/arm64/mm/proc.S
View File

@ -28,14 +28,21 @@
#include "proc-macros.S"
#ifndef CONFIG_SMP
/* PTWs cacheable, inner/outer WBWA not shareable */
#define TCR_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA
#ifdef CONFIG_ARM64_64K_PAGES
#define TCR_TG_FLAGS TCR_TG0_64K | TCR_TG1_64K
#else
/* PTWs cacheable, inner/outer WBWA shareable */
#define TCR_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA | TCR_SHARED
#define TCR_TG_FLAGS TCR_TG0_4K | TCR_TG1_4K
#endif
#ifdef CONFIG_SMP
#define TCR_SMP_FLAGS TCR_SHARED
#else
#define TCR_SMP_FLAGS 0
#endif
/* PTWs cacheable, inner/outer WBWA */
#define TCR_CACHE_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA
#define MAIR(attr, mt) ((attr) << ((mt) * 8))
/*
@ -209,18 +216,14 @@ ENTRY(__cpu_setup)
* Set/prepare TCR and TTBR. We use 512GB (39-bit) address range for
* both user and kernel.
*/
ldr x10, =TCR_TxSZ(VA_BITS) | TCR_FLAGS | \
TCR_ASID16 | TCR_TBI0 | (1 << 31)
ldr x10, =TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \
TCR_TG_FLAGS | TCR_ASID16 | TCR_TBI0
/*
* Read the PARange bits from ID_AA64MMFR0_EL1 and set the IPS bits in
* TCR_EL1.
*/
mrs x9, ID_AA64MMFR0_EL1
bfi x10, x9, #32, #3
#ifdef CONFIG_ARM64_64K_PAGES
orr x10, x10, TCR_TG0_64K
orr x10, x10, TCR_TG1_64K
#endif
msr tcr_el1, x10
ret // return to head.S
ENDPROC(__cpu_setup)