diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2016-02-09 17:08:14 +0100 |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-03-11 17:18:02 -0600 |
| commit | 1458dd951f7cc0127508f928497c9ab06b5e557d (patch) | |
| tree | a8f432dc38bfde94a6070f05c3be88ce64af7c0f /arch/powerpc/include/asm/reg_8xx.h | |
| parent | 7ee5cf6bfad7990cc33d10888d869c1eb7d4a927 (diff) | |
| download | lwn-1458dd951f7cc0127508f928497c9ab06b5e557d.tar.gz lwn-1458dd951f7cc0127508f928497c9ab06b5e557d.zip | |
powerpc/8xx: Handle CPU6 ERRATA directly in mtspr() macro
MPC8xx has an ERRATA on the use of mtspr() for some registers
This patch includes the ERRATA handling directly into mtspr() macro
so that mtspr() users don't need to bother about that errata
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/include/asm/reg_8xx.h')
| -rw-r--r-- | arch/powerpc/include/asm/reg_8xx.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/reg_8xx.h b/arch/powerpc/include/asm/reg_8xx.h index 0f71c811a841..d41412c7748b 100644 --- a/arch/powerpc/include/asm/reg_8xx.h +++ b/arch/powerpc/include/asm/reg_8xx.h @@ -50,4 +50,86 @@ #define DC_DFWT 0x40000000 /* Data cache is forced write through */ #define DC_LES 0x20000000 /* Caches are little endian mode */ +#ifdef CONFIG_8xx_CPU6 +#define do_mtspr_cpu6(rn, rn_addr, v) \ + do { \ + int _reg_cpu6 = rn_addr, _tmp_cpu6[1]; \ + asm volatile("stw %0, %1;" \ + "lwz %0, %1;" \ + "mtspr " __stringify(rn) ",%2" : \ + : "r" (_reg_cpu6), "m"(_tmp_cpu6), \ + "r" ((unsigned long)(v)) \ + : "memory"); \ + } while (0) + +#define do_mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : \ + : "r" ((unsigned long)(v)) \ + : "memory") +#define mtspr(rn, v) \ + do { \ + if (rn == SPRN_IMMR) \ + do_mtspr_cpu6(rn, 0x3d30, v); \ + else if (rn == SPRN_IC_CST) \ + do_mtspr_cpu6(rn, 0x2110, v); \ + else if (rn == SPRN_IC_ADR) \ + do_mtspr_cpu6(rn, 0x2310, v); \ + else if (rn == SPRN_IC_DAT) \ + do_mtspr_cpu6(rn, 0x2510, v); \ + else if (rn == SPRN_DC_CST) \ + do_mtspr_cpu6(rn, 0x3110, v); \ + else if (rn == SPRN_DC_ADR) \ + do_mtspr_cpu6(rn, 0x3310, v); \ + else if (rn == SPRN_DC_DAT) \ + do_mtspr_cpu6(rn, 0x3510, v); \ + else if (rn == SPRN_MI_CTR) \ + do_mtspr_cpu6(rn, 0x2180, v); \ + else if (rn == SPRN_MI_AP) \ + do_mtspr_cpu6(rn, 0x2580, v); \ + else if (rn == SPRN_MI_EPN) \ + do_mtspr_cpu6(rn, 0x2780, v); \ + else if (rn == SPRN_MI_TWC) \ + do_mtspr_cpu6(rn, 0x2b80, v); \ + else if (rn == SPRN_MI_RPN) \ + do_mtspr_cpu6(rn, 0x2d80, v); \ + else if (rn == SPRN_MI_CAM) \ + do_mtspr_cpu6(rn, 0x2190, v); \ + else if (rn == SPRN_MI_RAM0) \ + do_mtspr_cpu6(rn, 0x2390, v); \ + else if (rn == SPRN_MI_RAM1) \ + do_mtspr_cpu6(rn, 0x2590, v); \ + else if (rn == SPRN_MD_CTR) \ + do_mtspr_cpu6(rn, 0x3180, v); \ + else if (rn == SPRN_M_CASID) \ + do_mtspr_cpu6(rn, 0x3380, v); \ + else if (rn == SPRN_MD_AP) \ + do_mtspr_cpu6(rn, 0x3580, v); \ + else if (rn == SPRN_MD_EPN) \ + do_mtspr_cpu6(rn, 0x3780, v); \ + else if (rn == SPRN_M_TWB) \ + do_mtspr_cpu6(rn, 0x3980, v); \ + else if (rn == SPRN_MD_TWC) \ + do_mtspr_cpu6(rn, 0x3b80, v); \ + else if (rn == SPRN_MD_RPN) \ + do_mtspr_cpu6(rn, 0x3d80, v); \ + else if (rn == SPRN_M_TW) \ + do_mtspr_cpu6(rn, 0x3f80, v); \ + else if (rn == SPRN_MD_CAM) \ + do_mtspr_cpu6(rn, 0x3190, v); \ + else if (rn == SPRN_MD_RAM0) \ + do_mtspr_cpu6(rn, 0x3390, v); \ + else if (rn == SPRN_MD_RAM1) \ + do_mtspr_cpu6(rn, 0x3590, v); \ + else if (rn == SPRN_DEC) \ + do_mtspr_cpu6(rn, 0x2c00, v); \ + else if (rn == SPRN_TBWL) \ + do_mtspr_cpu6(rn, 0x3880, v); \ + else if (rn == SPRN_TBWU) \ + do_mtspr_cpu6(rn, 0x3a80, v); \ + else if (rn == SPRN_DPDR) \ + do_mtspr_cpu6(rn, 0x2d30, v); \ + else \ + do_mtspr(rn, v); \ + } while (0) +#endif + #endif /* _ASM_POWERPC_REG_8xx_H */ |