diff options
| author | Ian Munsie <imunsie@au1.ibm.com> | 2012-11-14 18:49:44 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-01-10 15:09:05 +1100 |
| commit | 42d02b81f265b77be39262666c888d50cb488fc5 (patch) | |
| tree | 057869a84883845ac91f536a683a0b9e9829e45c /arch/powerpc/include/asm/reg.h | |
| parent | 41c7b401b9c131a53823673a788d73e340ce4d2a (diff) | |
| download | linux-42d02b81f265b77be39262666c888d50cb488fc5.tar.bz2 | |
powerpc: Define differences between doorbells on book3e and book3s
There are a few key differences between doorbells on server compared
with embedded that we care about on Linux, namely:
- We have a new msgsndp instruction for directed privileged doorbells.
msgsnd is used for directed hypervisor doorbells.
- The tag we use in the instruction is the Thread Identification
Register of the recipient thread (since server doorbells can only
occur between threads within a single core), and is only 7 bits wide.
- A new message type is introduced for server doorbells (none of the
existing book3e message types are currently supported on book3s).
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/reg.h')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 3d5c9dc8917a..af88486b0c23 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -483,6 +483,7 @@ #ifndef SPRN_PIR #define SPRN_PIR 0x3FF /* Processor Identification Register */ #endif +#define SPRN_TIR 0x1BE /* Thread Identification Register */ #define SPRN_PTEHI 0x3D5 /* 981 7450 PTE HI word (S/W TLB load) */ #define SPRN_PTELO 0x3D6 /* 982 7450 PTE LO word (S/W TLB load) */ #define SPRN_PURR 0x135 /* Processor Utilization of Resources Reg */ |