diff options
| -rw-r--r-- | board/lwmon5/init.S | 2 | ||||
| -rw-r--r-- | cpu/ppc4xx/commproc.c | 14 | ||||
| -rw-r--r-- | cpu/ppc4xx/start.S | 52 | ||||
| -rw-r--r-- | include/configs/lwmon5.h | 19 | ||||
| -rw-r--r-- | include/ppc440.h | 4 | ||||
| -rw-r--r-- | post/tests.c | 2 |
6 files changed, 80 insertions, 13 deletions
diff --git a/board/lwmon5/init.S b/board/lwmon5/init.S index 6798e8098..5aade72b5 100644 --- a/board/lwmon5/init.S +++ b/board/lwmon5/init.S @@ -57,7 +57,7 @@ tlbtab: #ifdef CFG_INIT_RAM_DCACHE /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */ - tlbentry(CFG_INIT_RAM_ADDR, SZ_64K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G) + tlbentry(CFG_INIT_RAM_ADDR, SZ_4K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G) #endif /* TLB-entry for PCI Memory */ diff --git a/cpu/ppc4xx/commproc.c b/cpu/ppc4xx/commproc.c index 68aab5b7e..22156dd9d 100644 --- a/cpu/ppc4xx/commproc.c +++ b/cpu/ppc4xx/commproc.c @@ -26,10 +26,21 @@ #include <common.h> #include <commproc.h> - +#include <asm/io.h> #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER) +#if defined(CFG_POST_ALT_WORD_ADDR) +void post_word_store (ulong a) +{ + out_be32((void *)CFG_POST_ALT_WORD_ADDR, a); +} + +ulong post_word_load (void) +{ + return in_be32((void *)CFG_POST_ALT_WORD_ADDR); +} +#else /* CFG_POST_ALT_WORD_ADDR */ void post_word_store (ulong a) { volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR + CFG_POST_WORD_ADDR); @@ -41,6 +52,7 @@ ulong post_word_load (void) volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR + CFG_POST_WORD_ADDR); return *(volatile ulong *) save_addr; } +#endif /* CFG_POST_ALT_WORD_ADDR */ #endif /* CONFIG_POST || CONFIG_LOGBUFFER*/ diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S index 52601ed70..a73060436 100644 --- a/cpu/ppc4xx/start.S +++ b/cpu/ppc4xx/start.S @@ -636,6 +636,33 @@ _start: dcbz r0,r3 addi r3,r3,32 bdnz ..d_ag + + /* + * Lock the init-ram/stack in d-cache, so that other regions + * may use d-cache as well + * Note, that this current implementation locks exactly 4k + * of d-cache, so please make sure that you don't define a + * bigger init-ram area. Take a look at the lwmon5 440EPx + * implementation as a reference. + */ + msync + isync + /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */ + lis r1,0x0201 + ori r1,r1,0xf808 + mtspr dvlim,r1 + lis r1,0x0808 + ori r1,r1,0x0808 + mtspr dnv0,r1 + mtspr dnv1,r1 + mtspr dnv2,r1 + mtspr dnv3,r1 + mtspr dtv0,r1 + mtspr dtv1,r1 + mtspr dtv2,r1 + mtspr dtv3,r1 + msync + isync #endif /* CFG_INIT_RAM_DCACHE */ /* 440EP & 440GR are only 440er PPC's without internal SRAM */ @@ -1345,6 +1372,31 @@ relocate_code: mr r4,r10 mr r5,r11 #endif + +#ifdef CFG_INIT_RAM_DCACHE + /* + * Unlock the previously locked d-cache + */ + msync + isync + /* set TFLOOR/NFLOOR to 0 again */ + lis r6,0x0001 + ori r6,r6,0xf800 + mtspr dvlim,r6 + lis r6,0x0000 + ori r6,r6,0x0000 + mtspr dnv0,r6 + mtspr dnv1,r6 + mtspr dnv2,r6 + mtspr dnv3,r6 + mtspr dtv0,r6 + mtspr dtv1,r6 + mtspr dtv2,r6 + mtspr dtv3,r6 + msync + isync +#endif /* CFG_INIT_RAM_DCACHE */ + #if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \ defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \ defined(CONFIG_440SP) || defined(CONFIG_440SPE) diff --git a/include/configs/lwmon5.h b/include/configs/lwmon5.h index 5210024d8..0bf536b6b 100644 --- a/include/configs/lwmon5.h +++ b/include/configs/lwmon5.h @@ -71,15 +71,20 @@ /*----------------------------------------------------------------------- * Initial RAM & stack pointer *----------------------------------------------------------------------*/ -/* 440EPx/440GRx have 16KB of internal SRAM, so no need for D-Cache */ -#define CFG_INIT_RAM_ADDR CFG_OCM_BASE /* OCM */ -#define CFG_OCM_DATA_ADDR CFG_OCM_BASE - +/* + * On LWMON5 we use D-cache as init-ram and stack pointer. We also move + * the POST_WORD from OCM to a 440EPx register that preserves it's + * content during reset (GPT0_COM6). This way we reserve the OCM (16k) + * for logbuffer only. + */ +#define CFG_INIT_RAM_DCACHE 1 /* d-cache as init ram */ +#define CFG_INIT_RAM_ADDR 0x70000000 /* DCache */ #define CFG_INIT_RAM_END (4 << 10) -#define CFG_GBL_DATA_SIZE 256 /* num bytes initial data */ +#define CFG_GBL_DATA_SIZE 256 /* num bytes initial data*/ #define CFG_GBL_DATA_OFFSET (CFG_INIT_RAM_END - CFG_GBL_DATA_SIZE) -#define CFG_POST_WORD_ADDR (CFG_GBL_DATA_OFFSET - 0x4) -#define CFG_INIT_SP_OFFSET CFG_POST_WORD_ADDR +#define CFG_INIT_SP_OFFSET CFG_GBL_DATA_OFFSET +#define CFG_POST_ALT_WORD_ADDR (CFG_PERIPHERAL_BASE + GPT0_COMP6) + /* unused GPT0 COMP reg */ /*----------------------------------------------------------------------- * Serial Port diff --git a/include/ppc440.h b/include/ppc440.h index bfd1e1033..907744b87 100644 --- a/include/ppc440.h +++ b/include/ppc440.h @@ -1362,8 +1362,6 @@ #define plb1_bearl (PLB_ARBITER_BASE+ 0x0C) #define plb1_bearh (PLB_ARBITER_BASE+ 0x0D) -#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \ - defined(CONFIG_440EPX) || defined(CONFIG_440GRX) /* Pin Function Control Register 1 */ #define SDR0_PFC1 0x4101 #define SDR0_PFC1_U1ME_MASK 0x02000000 /* UART1 Mode Enable */ @@ -1429,7 +1427,7 @@ #define SDR0_MFR_PKT_REJ_EN1 0x00080000 /* Pkt Rej. Enable on EMAC3(1) */ #define SDR0_MFR_PKT_REJ_POL 0x00200000 /* Packet Reject Polarity */ -#endif /* defined(CONFIG_440EP) || defined(CONFIG_440GR) */ +#define GPT0_COMP6 0x00000098 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) #define SDR0_USB2D0CR 0x0320 diff --git a/post/tests.c b/post/tests.c index e1c3d28f5..0c49e3244 100644 --- a/post/tests.c +++ b/post/tests.c @@ -194,7 +194,7 @@ struct post_test post_list[] = "SPR test", "spr", "This test checks SPR contents.", - POST_ROM | POST_ALWAYS | POST_PREREL, + POST_RAM | POST_ALWAYS, &spr_post_test, NULL, NULL, |