diff options
| author | David Brown | 2009-10-01 17:43:29 +0100 |
|---|---|---|
| committer | Russell King | 2009-10-02 22:32:34 +0100 |
| commit | 31abdb744179159f8b605f56da5b197b188e1689 (patch) | |
| tree | 3f7831e86901526bd0da7d8da18ab4de348c22ff | |
| parent | 0a4bc5e89cfc3cc3083acef130cd8b670ee56914 (diff) | |
ARM: 5739/1: ARM: allow empty ATAG_CORE
From: David Brown <davidb@quicinc.com>
The ATAG_CORE is allowed to be empty. Although this is handled
by parse_tag_core(), __vet_atags during startup rejects this tag
unless it contains data. Allow the initial tag to be either the
full size, or empty.
Signed-off-by: David Brown <davidb@quicinc.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/head-common.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S index 93ad576b2d74..885a7214418d 100644 --- a/arch/arm/kernel/head-common.S +++ b/arch/arm/kernel/head-common.S @@ -13,6 +13,7 @@ #define ATAG_CORE 0x54410001 #define ATAG_CORE_SIZE ((2*4 + 3*4) >> 2) +#define ATAG_CORE_SIZE_EMPTY ((2*4) >> 2) .align 2 .type __switch_data, %object @@ -251,7 +252,8 @@ __vet_atags: bne 1f ldr r5, [r2, #0] @ is first tag ATAG_CORE? - subs r5, r5, #ATAG_CORE_SIZE + cmp r5, #ATAG_CORE_SIZE + cmpne r5, #ATAG_CORE_SIZE_EMPTY bne 1f ldr r5, [r2, #4] ldr r6, =ATAG_CORE |