diff options
Diffstat (limited to 'arch/i386/cpu/sc520/sc520.c')
| -rw-r--r-- | arch/i386/cpu/sc520/sc520.c | 33 |
1 files changed, 18 insertions, 15 deletions
diff --git a/arch/i386/cpu/sc520/sc520.c b/arch/i386/cpu/sc520/sc520.c index 4b566a7..519bfd8 100644 --- a/arch/i386/cpu/sc520/sc520.c +++ b/arch/i386/cpu/sc520/sc520.c @@ -44,24 +44,24 @@ void init_sc520(void) /* Set the UARTxCTL register at it's slower, * baud clock giving us a 1.8432 MHz reference */ - sc520_mmcr->uart1ctl = 0x07; - sc520_mmcr->uart2ctl = 0x07; + writeb(0x07, &sc520_mmcr->uart1ctl); + writeb(0x07, &sc520_mmcr->uart2ctl); /* first set the timer pin mapping */ - sc520_mmcr->clksel = 0x72; /* no clock frequency selected, use 1.1892MHz */ + writeb(0x72, &sc520_mmcr->clksel); /* no clock frequency selected, use 1.1892MHz */ /* enable PCI bus arbitrer */ - sc520_mmcr->sysarbctl = 0x02; /* enable concurrent mode */ + writeb(0x02, &sc520_mmcr->sysarbctl); /* enable concurrent mode */ - sc520_mmcr->sysarbmenb = 0x1f; /* enable external grants */ - sc520_mmcr->hbctl = 0x04; /* enable posted-writes */ + writeb(0x1f, &sc520_mmcr->sysarbmenb); /* enable external grants */ + writeb(0x04, &sc520_mmcr->hbctl); /* enable posted-writes */ if (CONFIG_SYS_SC520_HIGH_SPEED) { - sc520_mmcr->cpuctl = 0x02; /* set it to 133 MHz and write back */ + writeb(0x02, &sc520_mmcr->cpuctl); /* set it to 133 MHz and write back */ gd->cpu_clk = 133000000; printf("## CPU Speed set to 133MHz\n"); } else { - sc520_mmcr->cpuctl = 0x01; /* set it to 100 MHz and write back */ + writeb(0x01, &sc520_mmcr->cpuctl); /* set it to 100 MHz and write back */ printf("## CPU Speed set to 100MHz\n"); gd->cpu_clk = 100000000; } @@ -74,7 +74,7 @@ void init_sc520(void) "loop 0b\n": : : "ecx"); /* turn on the SDRAM write buffer */ - sc520_mmcr->dbctl = 0x11; + writeb(0x11, &sc520_mmcr->dbctl); /* turn on the cache and disable write through */ asm("movl %%cr0, %%eax\n" @@ -88,6 +88,7 @@ unsigned long init_sc520_dram(void) u32 dram_present=0; u32 dram_ctrl; + #ifdef CONFIG_SYS_SDRAM_DRCTMCTL /* these memory control registers are set up in the assember part, * in sc520_asm.S, during 'mem_init'. If we muck with them here, @@ -97,7 +98,8 @@ unsigned long init_sc520_dram(void) * simply dictates it. */ #else - int val; + u8 tmp; + u8 val; int cas_precharge_delay = CONFIG_SYS_SDRAM_PRECHARGE_DELAY; int refresh_rate = CONFIG_SYS_SDRAM_REFRESH_RATE; @@ -116,9 +118,10 @@ unsigned long init_sc520_dram(void) val = 3; /* 62.4us */ } - sc520_mmcr->drcctl = (sc520_mmcr->drcctl & 0xcf) | (val<<4); + tmp = (readb(&sc520_mmcr->drcctl) & 0xcf) | (val<<4); + writeb(tmp, &sc520_mmcr->drcctl); - val = sc520_mmcr->drctmctl & 0xf0; + val = readb(&sc520_mmcr->drctmctl) & 0xf0; if (cas_precharge_delay==3) { val |= 0x04; /* 3T */ @@ -133,12 +136,12 @@ unsigned long init_sc520_dram(void) } else { val |= 1; } - sc520_mmcr->drctmctl = val; + writeb(val, &c520_mmcr->drctmctl); #endif /* We read-back the configuration of the dram * controller that the assembly code wrote */ - dram_ctrl = sc520_mmcr->drcbendadr; + dram_ctrl = readl(&sc520_mmcr->drcbendadr); bd->bi_dram[0].start = 0; if (dram_ctrl & 0x80) { @@ -191,7 +194,7 @@ void reset_cpu(ulong addr) { printf("Resetting using SC520 MMCR\n"); /* Write a '1' to the SYS_RST of the RESCFG MMCR */ - sc520_mmcr->rescfg = 0x01; + writeb(0x01, &sc520_mmcr->rescfg); /* NOTREACHED */ } |