diff options
| -rw-r--r-- | purgatory/arch/ppc64/v2wrap.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/purgatory/arch/ppc64/v2wrap.S b/purgatory/arch/ppc64/v2wrap.S index b3563de..f69dad2 100644 --- a/purgatory/arch/ppc64/v2wrap.S +++ b/purgatory/arch/ppc64/v2wrap.S @@ -45,6 +45,7 @@ oris rn,rn,name##@h; \ ori rn,rn,name##@l +#define KDUMP_SIGNATURE 0xfeed1234 .machine ppc64 .globl purgatory_start @@ -64,6 +65,7 @@ master: isync mr 17,3 # save cpu id to r17 mr 15,4 # save physical address in reg15 + mr 18,6 # save kdump flag in reg18 LOADADDR(6,my_toc) ld 2,0(6) #setup toc @@ -94,6 +96,12 @@ master: mtctr 4 # prepare branch too mr 3,16 # restore dt address + LOADADDR(6,KDUMP_SIGNATURE) + cmpd 18,6 + bne regular + li 7,1 + std 7,24(4) # mark kdump flag at kernel +regular: lwz 7,0(4) # get the first instruction that we stole stw 7,0(0) # and put it in the slave loop at 0 # skip cache flush, do we care? |