From 1487adbdcf9594bb2eb686325a6f9540dad1b70a Mon Sep 17 00:00:00 2001 From: Ed Swarthout Date: Wed, 26 Sep 2007 16:35:54 -0500 Subject: 85xx io out functions need sync after write. This fixes the mc146818 rtc_read/write functions for 85xx. Signed-off-by: Ed Swarthout --- cpu/mpc85xx/start.S | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'cpu') diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S index 2c98c2a..5d65190 100644 --- a/cpu/mpc85xx/start.S +++ b/cpu/mpc85xx/start.S @@ -701,6 +701,7 @@ in8: .globl out8 out8: stb r4,0x0000(r3) + sync blr /*------------------------------------------------------------------------------- */ @@ -710,6 +711,7 @@ out8: .globl out16 out16: sth r4,0x0000(r3) + sync blr /*------------------------------------------------------------------------------- */ @@ -719,6 +721,7 @@ out16: .globl out16r out16r: sthbrx r4,r0,r3 + sync blr /*------------------------------------------------------------------------------- */ @@ -728,6 +731,7 @@ out16r: .globl out32 out32: stw r4,0x0000(r3) + sync blr /*------------------------------------------------------------------------------- */ @@ -737,6 +741,7 @@ out32: .globl out32r out32r: stwbrx r4,r0,r3 + sync blr /*------------------------------------------------------------------------------- */ -- cgit v1.1 From e1ce3cb617bb06f91f82f98915391175addf3e82 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Tue, 2 Oct 2007 11:12:27 -0500 Subject: Remove magic numbers from cache related operations for mpc85xx The mpc85xx start code uses some magic numbers that we actually have #defines for in so use those instead. Signed-off-by: Kumar Gala --- cpu/mpc85xx/start.S | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'cpu') diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S index 5d65190..e5cabca 100644 --- a/cpu/mpc85xx/start.S +++ b/cpu/mpc85xx/start.S @@ -266,13 +266,13 @@ _start_e500: */ lis r3,CFG_INIT_RAM_ADDR@h ori r3,r3,CFG_INIT_RAM_ADDR@l - li r2,512 /* 512*32=16K */ + li r2,(CFG_DCACHE_SIZE / (2 * CFG_CACHELINE_SIZE)) mtctr r2 li r0,0 1: dcbz r0,r3 dcbtls 0,r0,r3 - addi r3,r3,32 + addi r3,r3,CFG_CACHELINE_SIZE bdnz 1b /* Jump out the last 4K page and continue to 'normal' start */ @@ -1066,11 +1066,11 @@ unlock_ram_in_cache: /* invalidate the INIT_RAM section */ lis r3,(CFG_INIT_RAM_ADDR & ~31)@h ori r3,r3,(CFG_INIT_RAM_ADDR & ~31)@l - li r4,512 + li r4,(CFG_DCACHE_SIZE / (2 * CFG_CACHELINE_SIZE)) mtctr r4 1: icbi r0,r3 dcbi r0,r3 - addi r3,r3,32 + addi r3,r3,CFG_CACHELINE_SIZE bdnz 1b sync /* Wait for all icbi to complete on bus */ isync -- cgit v1.1 From 1e701e701304b3c3a3768ca83dd2ab7b9e88c77d Mon Sep 17 00:00:00 2001 From: "urwithsughosh@gmail.com" Date: Mon, 24 Sep 2007 13:36:01 -0400 Subject: MSR overwrite fix Hello, This patch fixes the MSR overwrite in the start.S when moving out of the last 4K page. Signed-off-by: Sughosh Ganu --- cpu/mpc85xx/start.S | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'cpu') diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S index e5cabca..ada6ea5 100644 --- a/cpu/mpc85xx/start.S +++ b/cpu/mpc85xx/start.S @@ -218,6 +218,8 @@ _start_e500: bdnz 0b /* Clear and set up some registers. */ + li r0,0 + mtmsr r0 li r0,0x0000 lis r1,0xffff mtspr DEC,r0 /* prevent dec exceptions */ @@ -277,7 +279,6 @@ _start_e500: /* Jump out the last 4K page and continue to 'normal' start */ #ifdef CFG_RAMBOOT - bl 3f b _start_cont #else /* Calculate absolute address in FLASH and jump there */ @@ -286,15 +287,9 @@ _start_e500: ori r3,r3,CFG_MONITOR_BASE@l addi r3,r3,_start_cont - _start + _START_OFFSET mtlr r3 + blr #endif -3: li r0,0 - mtspr SRR1,r0 /* Keep things disabled for now */ - mflr r1 - mtspr SRR0,r1 - rfi - isync - .text .globl _start _start: -- cgit v1.1 From df90968b48fb34fa9072fab150db2ac89678f537 Mon Sep 17 00:00:00 2001 From: "urwithsughosh@gmail.com" Date: Mon, 24 Sep 2007 13:32:13 -0400 Subject: Setting MSR[DE] in do_reset Hello, This patch ensures the soft reset of the board for the 85xx boards by setting the MSR[DE] in the do_reset function. Signed-off-by: Sughosh Ganu --- cpu/mpc85xx/cpu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'cpu') diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c index 08e0468..bbc5444 100644 --- a/cpu/mpc85xx/cpu.c +++ b/cpu/mpc85xx/cpu.c @@ -163,7 +163,12 @@ int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) * Initiate hard reset in debug control register DBCR0 * Make sure MSR[DE] = 1 */ - unsigned long val; + unsigned long val, msr; + + msr = mfmsr (); + msr |= MSR_DE; + mtmsr (msr); + val = mfspr(DBCR0); val |= 0x70000000; mtspr(DBCR0,val); -- cgit v1.1 From 22069215eb7adf5a3888bf7c7784ea9d70a72cd0 Mon Sep 17 00:00:00 2001 From: Shinya Kuribayashi Date: Sun, 21 Oct 2007 10:55:36 +0900 Subject: [MIPS] Fix $gp usage Now we load $gp with _GLOBAL_OFFSET_TABLE_, but this is incorrect use. As a general principle, we should use _gp for $gp. Thanks to linker script's help we fortunately have _gp which equals to _GLOBAL_OFFSET_TABLE_. But once _gp gets out of alignment, we will not be able to access to GOT entires, global variables and procedure entry points. The right thing to do is to use _gp. This patch also introduce a new symbol `.gpword _GLOBAL_OFFSET_TABLE_' which holds the offset from _gp. When updating GOT entries, we use this offset and _gp to calculate the final _GLOBAL_OFFSET_TABLE_. This patch is originally submitted by Vlad Lungu , then I made some change to leave over num_got_entries. Signed-off-by: Shinya Kuribayashi Cc: Vlad Lungu --- cpu/mips/start.S | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'cpu') diff --git a/cpu/mips/start.S b/cpu/mips/start.S index e91e213..074d01d 100644 --- a/cpu/mips/start.S +++ b/cpu/mips/start.S @@ -234,11 +234,11 @@ reset: li t0, CONF_CM_UNCACHED mtc0 t0, CP0_CONFIG - /* Initialize GOT pointer. + /* Initialize $gp. */ bal 1f nop - .word _GLOBAL_OFFSET_TABLE_ + .word _gp 1: move gp, ra lw t1, 0(ra) @@ -306,9 +306,9 @@ relocate_code: move t1, a2 /* - * Fix GOT pointer: + * Fix $gp: * - * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address + * New $gp = (Old $gp - CFG_MONITOR_BASE) + Destination Address */ move t6, gp sub gp, CFG_MONITOR_BASE @@ -341,15 +341,22 @@ relocate_code: j t0 nop + .gpword _GLOBAL_OFFSET_TABLE_ /* _GLOBAL_OFFSET_TABLE_ - _gp */ .word uboot_end_data .word uboot_end .word num_got_entries in_ram: - /* Now we want to update GOT. + /* + * Now we want to update GOT. + * + * GOT[0] is reserved. GOT[1] is also reserved for the dynamic object + * generated by GNU ld. Skip these reserved entries from relocation. */ lw t3, -4(t0) /* t3 <-- num_got_entries */ - addi t4, gp, 8 /* Skipping first two entries. */ + lw t4, -16(t0) /* t4 <-- (_GLOBAL_OFFSET_TABLE_ - _gp) */ + add t4, t4, gp /* t4 now holds _GLOBAL_OFFSET_TABLE_ */ + addi t4, t4, 8 /* Skipping first two entries. */ li t2, 2 1: lw t1, 0(t4) -- cgit v1.1 From 00101dd7a32d12f698150123e47e4b3420279f86 Mon Sep 17 00:00:00 2001 From: Shinya Kuribayashi Date: Sun, 21 Oct 2007 21:30:42 +0900 Subject: [MIPS] Add PIC-related switches to PLATFORM_{CPP,LD}FLAGS and cleanup Signed-off-by: Shinya Kuribayashi --- cpu/mips/config.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'cpu') diff --git a/cpu/mips/config.mk b/cpu/mips/config.mk index b29986e..487c4eb 100644 --- a/cpu/mips/config.mk +++ b/cpu/mips/config.mk @@ -35,6 +35,6 @@ else ENDIANNESS = -EB endif -MIPSFLAGS += $(ENDIANNESS) -mabicalls +MIPSFLAGS += $(ENDIANNESS) PLATFORM_CPPFLAGS += $(MIPSFLAGS) -- cgit v1.1