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FVP: Ensure system reset wake-up results in cold boot 

platform_get_entrypoint() did not consider that a wakeup due to
System Reset Pin (by reading the power controller's PSYSR) requires
a cold boot. As a result, the code would execute the warm boot path
and eventually panic because entrypoint mailboxes are empty.

This patch ensures that the following wake-up reasons result in cold
boot:
  - Cold Power-on
  - System Reset Pin (includes reset by software)

Fixes ARM-software/tf-issues#217

Change-Id: I65ae0a0f7a46548b575900a5aac107d352b0e2cd
This commit is contained in:
Juan Castillo 2014-07-11 10:23:18 +01:00
parent a1a441775f
commit 08783e4326
1 changed files with 5 additions and 2 deletions
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7
plat/fvp/aarch64/fvp_helpers.S
View File

@ -122,8 +122,11 @@ func platform_get_entrypoint
str w2, [x1, #PSYSR_OFF]
ldr w2, [x1, #PSYSR_OFF]
ubfx w2, w2, #PSYSR_WK_SHIFT, #PSYSR_WK_MASK
cbnz w2, warm_reset
mov x0, x2
cmp w2, #WKUP_PPONR
beq warm_reset
cmp w2, #WKUP_GICREQ
beq warm_reset
mov x0, #0
b exit
warm_reset:
/* ---------------------------------------------