diff options
author | Kumar Gala <galak@kernel.crashing.org> | 2009-02-12 08:54:53 -0500 |
---|---|---|
committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-02-22 23:53:03 -0500 |
commit | 620165f971753c2c451c880796bac7cd66f3534a (patch) | |
tree | 1ec36dc067ff0af865f4f6954dbea84ef4205294 /arch/powerpc/include | |
parent | 6ed8d12849d651c646c108807754a544d2e506f1 (diff) |
powerpc: Add support for using doorbells for SMP IPI
The e500mc supports the new msgsnd/doorbell mechanisms that were added in
the Power ISA 2.05 architecture. We use the normal level doorbell for
doing SMP IPIs at this point.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r-- | arch/powerpc/include/asm/cputable.h | 4 | ||||
-rw-r--r-- | arch/powerpc/include/asm/dbell.h | 43 |
2 files changed, 46 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index 4911104791c3..fca161190db4 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h | |||
@@ -145,6 +145,7 @@ extern const char *powerpc_base_platform; | |||
145 | #define CPU_FTR_USE_TB ASM_CONST(0x0000000000000040) | 145 | #define CPU_FTR_USE_TB ASM_CONST(0x0000000000000040) |
146 | #define CPU_FTR_L2CSR ASM_CONST(0x0000000000000080) | 146 | #define CPU_FTR_L2CSR ASM_CONST(0x0000000000000080) |
147 | #define CPU_FTR_601 ASM_CONST(0x0000000000000100) | 147 | #define CPU_FTR_601 ASM_CONST(0x0000000000000100) |
148 | #define CPU_FTR_DBELL ASM_CONST(0x0000000000000200) | ||
148 | #define CPU_FTR_CAN_NAP ASM_CONST(0x0000000000000400) | 149 | #define CPU_FTR_CAN_NAP ASM_CONST(0x0000000000000400) |
149 | #define CPU_FTR_L3CR ASM_CONST(0x0000000000000800) | 150 | #define CPU_FTR_L3CR ASM_CONST(0x0000000000000800) |
150 | #define CPU_FTR_L3_DISABLE_NAP ASM_CONST(0x0000000000001000) | 151 | #define CPU_FTR_L3_DISABLE_NAP ASM_CONST(0x0000000000001000) |
@@ -373,7 +374,8 @@ extern const char *powerpc_base_platform; | |||
373 | CPU_FTR_NODSISRALIGN | CPU_FTR_NOEXECUTE) | 374 | CPU_FTR_NODSISRALIGN | CPU_FTR_NOEXECUTE) |
374 | #define CPU_FTRS_E500MC (CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB | \ | 375 | #define CPU_FTRS_E500MC (CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB | \ |
375 | CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_NODSISRALIGN | \ | 376 | CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_NODSISRALIGN | \ |
376 | CPU_FTR_L2CSR | CPU_FTR_LWSYNC | CPU_FTR_NOEXECUTE) | 377 | CPU_FTR_L2CSR | CPU_FTR_LWSYNC | CPU_FTR_NOEXECUTE | \ |
378 | CPU_FTR_DBELL) | ||
377 | #define CPU_FTRS_GENERIC_32 (CPU_FTR_COMMON | CPU_FTR_NODSISRALIGN) | 379 | #define CPU_FTRS_GENERIC_32 (CPU_FTR_COMMON | CPU_FTR_NODSISRALIGN) |
378 | 380 | ||
379 | /* 64-bit CPUs */ | 381 | /* 64-bit CPUs */ |
diff --git a/arch/powerpc/include/asm/dbell.h b/arch/powerpc/include/asm/dbell.h new file mode 100644 index 000000000000..501189a543d1 --- /dev/null +++ b/arch/powerpc/include/asm/dbell.h | |||
@@ -0,0 +1,43 @@ | |||
1 | /* | ||
2 | * Copyright 2009 Freescale Semicondutor, Inc. | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or | ||
5 | * modify it under the terms of the GNU General Public License | ||
6 | * as published by the Free Software Foundation; either version | ||
7 | * 2 of the License, or (at your option) any later version. | ||
8 | * | ||
9 | * provides masks and opcode images for use by code generation, emulation | ||
10 | * and for instructions that older assemblers might not know about | ||
11 | */ | ||
12 | #ifndef _ASM_POWERPC_DBELL_H | ||
13 | #define _ASM_POWERPC_DBELL_H | ||
14 | |||
15 | #include <linux/smp.h> | ||
16 | #include <linux/threads.h> | ||
17 | |||
18 | #include <asm/ppc-opcode.h> | ||
19 | |||
20 | #define PPC_DBELL_MSG_BRDCAST (0x04000000) | ||
21 | #define PPC_DBELL_TYPE(x) (((x) & 0xf) << 28) | ||
22 | enum ppc_dbell { | ||
23 | PPC_DBELL = 0, /* doorbell */ | ||
24 | PPC_DBELL_CRIT = 1, /* critical doorbell */ | ||
25 | PPC_G_DBELL = 2, /* guest doorbell */ | ||
26 | PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */ | ||
27 | PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */ | ||
28 | }; | ||
29 | |||
30 | #ifdef CONFIG_SMP | ||
31 | extern unsigned long dbell_smp_message[NR_CPUS]; | ||
32 | extern void smp_dbell_message_pass(int target, int msg); | ||
33 | #endif | ||
34 | |||
35 | static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag) | ||
36 | { | ||
37 | u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) | | ||
38 | (tag & 0x07ffffff); | ||
39 | |||
40 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | ||
41 | } | ||
42 | |||
43 | #endif /* _ASM_POWERPC_DBELL_H */ | ||