--- ../u-boot/board/dbau1x00/memsetup.S 2003-10-15 16:53:48.000000000 -0700 +++ board/dbau1x00/memsetup.S 2003-11-26 08:33:00.000000000 -0800 @@ -4,23 +4,284 @@ #include #include #include +#include + +#define AU1500_SYS_ADDR 0xB1900000 +#define sys_endian 0x0038 +#define CP0_Config0 $16 +#define MEM_1MS ((396000000/1000000) * 1000) + + .text + .set noreorder + .set mips32 .globl memsetup memsetup: + /* + * Step 1) Establish CPU endian mode. + * Db1500-specific: + * Switch S1.1 Off(bit7 reads 1) is Little Endian + * Switch S1.1 On (bit7 reads 0) is Big Endian + */ + li t0, MEM_STCFG1 + li t1, 0x00000080 + sw t1, 0(t0) + + li t0, MEM_STTIME1 + li t1, 0x22080a20 + sw t1, 0(t0) + + li t0, MEM_STADDR1 + li t1, 0x10c03f00 + sw t1, 0(t0) + + li t0, 0xAE000008 + lw t1,0(t0) + andi t1,t1,0x80 + beq zero,t1,big_endian + nop +little_endian: + + /* Change Au1 core to little endian */ + li t0, AU1500_SYS_ADDR + li t1, 1 + sw t1, sys_endian(t0) + mfc0 t2, CP0_CONFIG + mtc0 t2, CP0_CONFIG + nop + nop + + /* Big Endian is default so nothing to do but fall through */ + +big_endian: + + /* + * Step 2) Establish Status Register + * (set BEV, clear ERL, clear EXL, clear IE) + */ + li t1, 0x00400000 + mtc0 t1, CP0_STATUS + + /* + * Step 3) Establish CP0 Config0 + * (set OD, set K0=3) + */ + li t1, 0x00080003 + mtc0 t1, CP0_CONFIG + + /* + * Step 4) Disable Watchpoint facilities + */ + li t1, 0x00000000 + mtc0 t1, CP0_WATCHLO + mtc0 t1, CP0_IWATCHLO + /* + * Step 5) Disable the performance counters + */ + mtc0 zero, CP0_PERFORMANCE + nop + + /* + * Step 6) Establish EJTAG Debug register + */ + mtc0 zero, CP0_DEBUG + nop + + /* + * Step 7) Establish Cause + * (set IV bit) + */ + li t1, 0x00800000 + mtc0 t1, CP0_CAUSE + + /* Establish Wired (and Random) */ + mtc0 zero, CP0_WIRED + nop + /* First setup pll:s to make serial work ok */ /* We have a 12 MHz crystal */ li t0, SYS_CPUPLL - li t1, 0x21 /* 396 MHz */ + li t1, 0x21 /* 396 MHz */ sw t1, 0(t0) sync nop + nop + /* wait 1mS for clocks to settle */ + li t1, MEM_1MS +1: add t1, -1 + bne t1, zero, 1b + nop /* Setup AUX PLL */ li t0, SYS_AUXPLL - li t1, 8 /* 96 MHz */ + li t1, 0x20 /* 96 MHz */ sw t1, 0(t0) /* aux pll */ sync + /* Static memory controller */ + + /* RCE0 AMD 29LV640M MirrorBit Flash */ + li t0, MEM_STCFG0 + li t1, 0x00000013 + sw t1, 0(t0) + + li t0, MEM_STTIME0 + li t1, 0x040181D7 + sw t1, 0(t0) + + li t0, MEM_STADDR0 + li t1, 0x11E03F80 + sw t1, 0(t0) + + /* RCE1 CPLD Board Logic */ + li t0, MEM_STCFG1 + li t1, 0x00000080 + sw t1, 0(t0) + + li t0, MEM_STTIME1 + li t1, 0x22080a20 + sw t1, 0(t0) + + li t0, MEM_STADDR1 + li t1, 0x10c03f00 + sw t1, 0(t0) + + /* RCE2 CPLD Board Logic */ + li t0, MEM_STCFG2 + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, MEM_STTIME2 + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, MEM_STADDR2 + li t1, 0x00000000 + sw t1, 0(t0) + + /* RCE3 PCMCIA 250ns */ + li t0, MEM_STCFG3 + li t1, 0x00000002 + sw t1, 0(t0) + + + li t0, MEM_STTIME3 + li t1, 0x280E3E07 + sw t1, 0(t0) + + li t0, MEM_STADDR3 + li t1, 0x10000000 + sw t1, 0(t0) + + sync + + /* Set peripherals to a known state */ + li t0, IC0_CFG0CLR + li t1, 0xFFFFFFFF + sw t1, 0(t0) + + li t0, IC0_CFG0CLR + sw t1, 0(t0) + + li t0, IC0_CFG1CLR + sw t1, 0(t0) + + li t0, IC0_CFG2CLR + sw t1, 0(t0) + + li t0, IC0_SRCSET + sw t1, 0(t0) + + li t0, IC0_ASSIGNSET + sw t1, 0(t0) + + li t0, IC0_WAKECLR + sw t1, 0(t0) + + li t0, IC0_RISINGCLR + sw t1, 0(t0) + + li t0, IC0_FALLINGCLR + sw t1, 0(t0) + + li t0, IC0_TESTBIT + li t1, 0x00000000 + sw t1, 0(t0) + sync + + li t0, IC1_CFG0CLR + li t1, 0xFFFFFFFF + sw t1, 0(t0) + + li t0, IC1_CFG0CLR + sw t1, 0(t0) + + li t0, IC1_CFG1CLR + sw t1, 0(t0) + + li t0, IC1_CFG2CLR + sw t1, 0(t0) + + li t0, IC1_SRCSET + sw t1, 0(t0) + + li t0, IC1_ASSIGNSET + sw t1, 0(t0) + + li t0, IC1_WAKECLR + sw t1, 0(t0) + + li t0, IC1_RISINGCLR + sw t1, 0(t0) + + li t0, IC1_FALLINGCLR + sw t1, 0(t0) + + li t0, IC1_TESTBIT + li t1, 0x00000000 + sw t1, 0(t0) + sync + + li t0, SYS_FREQCTRL0 + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, SYS_FREQCTRL1 + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, SYS_CLKSRC + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, SYS_PININPUTEN + li t1, 0x00000000 + sw t1, 0(t0) + sync + + li t0, 0xB1100100 + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, 0xB1400100 + li t1, 0x00000000 + sw t1, 0(t0) + + + li t0, SYS_WAKEMSK + li t1, 0x00000000 + sw t1, 0(t0) + + li t0, SYS_WAKESRC + li t1, 0x00000000 + sw t1, 0(t0) + + /* wait 1mS before setup */ + li t1, MEM_1MS +1: add t1, -1 + bne t1, zero, 1b + nop + /* SDCS 0,1 SDRAM */ li t0, MEM_SDMODE0 li t1, 0x005522AA @@ -30,6 +291,10 @@ memsetup: li t1, 0x005522AA sw t1, 0(t0) + li t0, MEM_SDMODE2 + li t1, 0x00000000 + sw t1, 0(t0) + li t0, MEM_SDADDR0 li t1, 0x001003F8 sw t1, 0(t0) @@ -38,6 +303,11 @@ memsetup: li t0, MEM_SDADDR1 li t1, 0x001023F8 sw t1, 0(t0) + + li t0, MEM_SDADDR2 + li t1, 0x00000000 + sw t1, 0(t0) + sync li t0, MEM_SDREFCFG @@ -70,48 +340,23 @@ memsetup: sw t1, 0(t0) sync - /* Static memory controller */ - - /* RCE0 AMD 29LV640M MirrorBit Flash */ - li t0, MEM_STCFG0 - li t1, 0x00000003 - sw t1, 0(t0) - - li t0, MEM_STTIME0 - li t1, 0x22080b20 - sw t1, 0(t0) - - li t0, MEM_STADDR0 - li t1, 0x11E03F80 - sw t1, 0(t0) - - /* RCE1 CPLD Board Logic */ - li t0, MEM_STCFG1 - li t1, 0x00000080 - sw t1, 0(t0) - - li t0, MEM_STTIME1 - li t1, 0x22080a20 - sw t1, 0(t0) - - li t0, MEM_STADDR1 - li t1, 0x10c03f00 - sw t1, 0(t0) + /* wait 1mS after setup */ + li t1, MEM_1MS +1: add t1, -1 + bne t1, zero, 1b + nop - /* RCE3 PCMCIA 250ns */ - li t0, MEM_STCFG3 - li t1, 0x00000002 + li t0, SYS_PINFUNC + li t1, 0x00008080 sw t1, 0(t0) - - li t0, MEM_STTIME3 - li t1, 0x280E3E07 + li t0, SYS_TRIOUTCLR + li t1, 0x00001FFF sw t1, 0(t0) - li t0, MEM_STADDR3 - li t1, 0x10000000 + li t0, SYS_OUTPUTCLR + li t1, 0x00008000 sw t1, 0(t0) - sync j ra