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-rw-r--r--board/dbau1x00/memsetup.S386
1 files changed, 315 insertions, 71 deletions
diff --git a/board/dbau1x00/memsetup.S b/board/dbau1x00/memsetup.S
index 6c61e6f..d2a17a0 100644
--- a/board/dbau1x00/memsetup.S
+++ b/board/dbau1x00/memsetup.S
@@ -4,114 +4,358 @@
#include <version.h>
#include <asm/regdef.h>
#include <asm/au1x00.h>
+#include <asm/mipsregs.h>
+
+#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 */
- sw t1, 0(t0)
+ li t0, SYS_CPUPLL
+ 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 */
- sw t1, 0(t0) /* aux pll */
+ li t0, SYS_AUXPLL
+ li t1, 0x20 /* 96 MHz */
+ sw t1, 0(t0) /* aux pll */
sync
-/* SDCS 0,1 SDRAM */
- li t0, MEM_SDMODE0
- li t1, 0x005522AA
- sw t1, 0(t0)
+ /* Static memory controller */
- li t0, MEM_SDMODE1
- li t1, 0x005522AA
- sw t1, 0(t0)
+ /* RCE0 AMD 29LV640M MirrorBit Flash */
+ li t0, MEM_STCFG0
+ li t1, 0x00000013
+ sw t1, 0(t0)
- li t0, MEM_SDADDR0
- li t1, 0x001003F8
- 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)
- li t0, MEM_SDADDR1
- li t1, 0x001023F8
- sw t1, 0(t0)
- sync
+ /* RCE1 CPLD Board Logic */
+ li t0, MEM_STCFG1
+ li t1, 0x00000080
+ sw t1, 0(t0)
- li t0, MEM_SDREFCFG
- li t1, 0x64000C24 /* Disable */
- sw t1, 0(t0)
- sync
+ li t0, MEM_STTIME1
+ li t1, 0x22080a20
+ sw t1, 0(t0)
- li t0, MEM_SDPRECMD
- sw zero, 0(t0)
- sync
+ 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)
- li t0, MEM_SDAUTOREF
- sw zero, 0(t0)
- sync
- sw zero, 0(t0)
sync
- li t0, MEM_SDREFCFG
- li t1, 0x66000C24 /* Enable */
- sw t1, 0(t0)
+ /* 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, MEM_SDWRMD0
- li t1, 0x00000033
- sw t1, 0(t0)
+ 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, MEM_SDWRMD1
- li t1, 0x00000033
- sw t1, 0(t0)
+ 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
- /* Static memory controller */
+ li t0, 0xB1100100
+ li t1, 0x00000000
+ sw t1, 0(t0)
- /* RCE0 AMD 29LV640M MirrorBit Flash */
- li t0, MEM_STCFG0
- li t1, 0x00000003
- sw t1, 0(t0)
+ li t0, 0xB1400100
+ li t1, 0x00000000
+ 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)
+ li t0, SYS_WAKEMSK
+ li t1, 0x00000000
+ sw t1, 0(t0)
- /* RCE1 CPLD Board Logic */
- li t0, MEM_STCFG1
- li t1, 0x00000080
- sw t1, 0(t0)
+ li t0, SYS_WAKESRC
+ li t1, 0x00000000
+ sw t1, 0(t0)
- li t0, MEM_STTIME1
- li t1, 0x22080a20
- sw t1, 0(t0)
+ /* wait 1mS before setup */
+ li t1, MEM_1MS
+1: add t1, -1
+ bne t1, zero, 1b
+ nop
- li t0, MEM_STADDR1
- li t1, 0x10c03f00
- sw t1, 0(t0)
+/* SDCS 0,1 SDRAM */
+ li t0, MEM_SDMODE0
+ li t1, 0x005522AA
+ sw t1, 0(t0)
- /* RCE3 PCMCIA 250ns */
- li t0, MEM_STCFG3
- li t1, 0x00000002
- sw t1, 0(t0)
+ li t0, MEM_SDMODE1
+ 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)
+
+
+ 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
+ li t1, 0x64000C24 /* Disable */
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDPRECMD
+ sw zero, 0(t0)
+ sync
+
+ li t0, MEM_SDAUTOREF
+ sw zero, 0(t0)
+ sync
+ sw zero, 0(t0)
+ sync
+
+ li t0, MEM_SDREFCFG
+ li t1, 0x66000C24 /* Enable */
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD0
+ li t1, 0x00000033
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD1
+ li t1, 0x00000033
+ sw t1, 0(t0)
+ sync
+
+ /* wait 1mS after setup */
+ li t1, MEM_1MS
+1: add t1, -1
+ bne t1, zero, 1b
+ nop
- li t0, MEM_STTIME3
- li t1, 0x280E3E07
- sw t1, 0(t0)
+ li t0, SYS_PINFUNC
+ li t1, 0x00008080
+ sw t1, 0(t0)
- li t0, MEM_STADDR3
- li t1, 0x10000000
- sw t1, 0(t0)
+ li t0, SYS_TRIOUTCLR
+ li t1, 0x00001FFF
+ sw t1, 0(t0)
+ li t0, SYS_OUTPUTCLR
+ li t1, 0x00008000
+ sw t1, 0(t0)
sync
j ra
generated by cgit v1.1 at 2024-12-16 08:48:08 +0000