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MIPS: Netlogic: Reduce size of reset code

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Update thread wakeup function to use scratch registers for saving SP and
RA. Move the register restore code needed for thread 0 to the calling
function. This reduces the size of code copied to the reset vector.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6910/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jayachandran C
2014-05-09 16:35:14 +05:30
committed by Ralf Baechle
parent 2e240ddd09
commit a3deecfaa3
2 changed files with 16 additions and 11 deletions
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12
arch/mips/netlogic/common/smpboot.S
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@@ -54,8 +54,9 @@
.set noat
.set arch=xlr /* for mfcr/mtcr, XLR is sufficient */
FEXPORT(xlp_boot_core0_siblings) /* "Master" cpu starts from here */
dmtc0 sp, $4, 2 /* SP saved in UserLocal */
/* Called by the boot cpu to wake up its sibling threads */
NESTED(xlp_boot_core0_siblings, PT_SIZE, sp)
/* CPU register contents lost when enabling threads, save them first */
SAVE_ALL
sync
/* find the location to which nlm_boot_siblings was relocated */
@@ -65,9 +66,12 @@ FEXPORT(xlp_boot_core0_siblings) /* "Master" cpu starts from here */
dsubu t2, t1
daddu t2, t0
/* call it */
jr t2
jalr t2
nop
/* not reached */
RESTORE_ALL
jr ra
nop
END(xlp_boot_core0_siblings)
NESTED(nlm_boot_secondary_cpus, 16, sp)
/* Initialize CP0 Status */