#define AU1500_SYS_ADDR 0xB1900000
#define sys_endian 0x0038
#define CP0_Config0 $16
-#define MEM_1MS ((396000000/1000000) * 1000)
+#define CPU_SCALE ((CFG_MHZ) / 12) /* CPU clock is a multiple of 12 MHz */
+#define MEM_1MS ((CFG_MHZ) * 1000)
.text
.set noreorder
* Switch S1.1 Off(bit7 reads 1) is Little Endian
* Switch S1.1 On (bit7 reads 0) is Big Endian
*/
+#ifdef CONFIG_DBAU1550
+ li t0, MEM_STCFG2
+ li t1, 0x00000040
+ sw t1, 0(t0)
+
+ li t0, MEM_STTIME2
+ li t1, 0x22080a20
+ sw t1, 0(t0)
+
+ li t0, MEM_STADDR2
+ li t1, 0x10c03f00
+ sw t1, 0(t0)
+#else
li t0, MEM_STCFG1
li t1, 0x00000080
sw t1, 0(t0)
li t0, MEM_STADDR1
li t1, 0x10c03f00
sw t1, 0(t0)
+#endif
- li t0, 0xAE000008
- lw t1,0(t0)
+ li t0, DB1XX0_BCSR_ADDR
+ lw t1,8(t0)
andi t1,t1,0x80
beq zero,t1,big_endian
nop
mtc0 zero, CP0_WIRED
nop
+#ifdef CONFIG_DBAU1550
+ /* No workaround if running from ram */
+ lui t0, 0xffc0
+ lui t3, 0xbfc0
+ and t1, ra, t0
+ bne t1, t3, noCacheJump
+ nop
+
+ /*** From AMD YAMON ***/
+ /*
+ * Step 8) Initialize the caches
+ */
+ li t0, (16*1024)
+ li t1, 32
+ li t2, 0x80000000
+ addu t3, t0, t2
+cacheloop:
+ cache 0, 0(t2)
+ cache 1, 0(t2)
+ addu t2, t1
+ bne t2, t3, cacheloop
+ nop
+
+ /* Save return address */
+ move t3, ra
+
+ /* Run from cacheable space now */
+ bal cachehere
+ nop
+cachehere:
+ li t1, ~0x20000000 /* convert to KSEG0 */
+ and t0, ra, t1
+ addi t0, 5*4 /* 5 insns beyond cachehere */
+ jr t0
+ nop
+
+ /* Restore return address */
+ move ra, t3
+
+ /*
+ * Step 9) Initialize the TLB
+ */
+ li t0, 0 # index value
+ li t1, 0x00000000 # entryhi value
+ li t2, 32 # 32 entries
+
+tlbloop:
+ /* Probe TLB for matching EntryHi */
+ mtc0 t1, CP0_ENTRYHI
+ tlbp
+ nop
+
+ /* Examine Index[P], 1=no matching entry */
+ mfc0 t3, CP0_INDEX
+ li t4, 0x80000000
+ and t3, t4, t3
+ addiu t1, t1, 1 # increment t1 (asid)
+ beq zero, t3, tlbloop
+ nop
+
+ /* Initialize the TLB entry */
+ mtc0 t0, CP0_INDEX
+ mtc0 zero, CP0_ENTRYLO0
+ mtc0 zero, CP0_ENTRYLO1
+ mtc0 zero, CP0_PAGEMASK
+ tlbwi
+
+ /* Do it again */
+ addiu t0, t0, 1
+ bne t0, t2, tlbloop
+ 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, CPU_SCALE /* CPU clock */
sw t1, 0(t0)
sync
nop
sync
/* Static memory controller */
+ /* RCE0 - can not change while fetching, do so from icache */
+ move t2, ra /* Store return address */
+ bal getAddr
+ nop
- /* RCE0 AMD 29LV640M MirrorBit Flash */
+getAddr:
+ move t1, ra
+ move ra, t2 /* Move return addess back */
+
+ cache 0x14,0(t1)
+ cache 0x14,32(t1)
+ /*** /From YAMON ***/
+
+noCacheJump:
+#endif /* CONFIG_DBAU1550 */
+
+#ifdef CONFIG_DBAU1550
+ li t0, MEM_STTIME0
+ li t1, 0x040181D7
+ sw t1, 0(t0)
+
+ /* RCE0 AMD MirrorBit Flash (?) */
li t0, MEM_STCFG0
- li t1, 0x00000013
+ li t1, 0x00000003
sw t1, 0(t0)
+ li t0, MEM_STADDR0
+ li t1, 0x11803E00
+ sw t1, 0(t0)
+#else /* CONFIG_DBAU1550 */
li t0, MEM_STTIME0
- li t1, 0x040181D7
+ li t1, 0x00014C0F
+ sw t1, 0(t0)
+
+ /* RCE0 AMD 29LV640M MirrorBit Flash */
+ li t0, MEM_STCFG0
+ li t1, 0x00000013
sw t1, 0(t0)
li t0, MEM_STADDR0
li t1, 0x11E03F80
sw t1, 0(t0)
+#endif /* CONFIG_DBAU1550 */
/* RCE1 CPLD Board Logic */
li t0, MEM_STCFG1
li t1, 0x10c03f00
sw t1, 0(t0)
+#ifdef CONFIG_DBAU1550
/* RCE2 CPLD Board Logic */
li t0, MEM_STCFG2
+ li t1, 0x00000040
+ sw t1, 0(t0)
+
+ li t0, MEM_STTIME2
+ li t1, 0x22080a20
+ sw t1, 0(t0)
+
+ li t0, MEM_STADDR2
+ li t1, 0x10c03f00
+ sw t1, 0(t0)
+#else
+ li t0, MEM_STCFG2
li t1, 0x00000000
sw t1, 0(t0)
li t0, MEM_STADDR2
li t1, 0x00000000
sw t1, 0(t0)
+#endif
/* RCE3 PCMCIA 250ns */
li t0, MEM_STCFG3
bne t1, zero, 1b
nop
+#ifdef CONFIG_DBAU1550
+/* SDCS 0,1,2 DDR SDRAM */
+ li t0, MEM_SDMODE0
+ li t1, 0x04276221
+ sw t1, 0(t0)
+
+ li t0, MEM_SDMODE1
+ li t1, 0x04276221
+ sw t1, 0(t0)
+
+ li t0, MEM_SDMODE2
+ li t1, 0x04276221
+ sw t1, 0(t0)
+
+ li t0, MEM_SDADDR0
+ li t1, 0xe21003f0
+ sw t1, 0(t0)
+
+ li t0, MEM_SDADDR1
+ li t1, 0xe21043f0
+ sw t1, 0(t0)
+
+ li t0, MEM_SDADDR2
+ li t1, 0xe21083f0
+ sw t1, 0(t0)
+
+ sync
+
+ li t0, MEM_SDCONFIGA
+ li t1, 0x9030060a /* Program refresh - disabled */
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDCONFIGB
+ li t1, 0x00028000
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDPRECMD /* Precharge all */
+ li t1, 0
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD0
+ li t1, 0x40000000
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD1
+ li t1, 0x40000000
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD2
+ li t1, 0x40000000
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD0
+ li t1, 0x00000063
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD1
+ li t1, 0x00000063
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDWRMD2
+ li t1, 0x00000063
+ sw t1, 0(t0)
+ sync
+
+ li t0, MEM_SDPRECMD /* Precharge all */
+ sw zero, 0(t0)
+ sync
+
+ /* Issue 2 autoref */
+ li t0, MEM_SDAUTOREF
+ sw zero, 0(t0)
+ sync
+
+ li t0, MEM_SDAUTOREF
+ sw zero, 0(t0)
+ sync
+
+ /* Enable refresh */
+ li t0, MEM_SDCONFIGA
+ li t1, 0x9830060a /* Program refresh - enabled */
+ sw t1, 0(t0)
+ sync
+
+#else /* CONFIG_DBAU1550 */
/* SDCS 0,1 SDRAM */
li t0, MEM_SDMODE0
li t1, 0x005522AA
sw t1, 0(t0)
sync
+#endif /* CONFIG_DBAU1550 */
/* wait 1mS after setup */
li t1, MEM_1MS
1: add t1, -1
projects / platform / kernel / u-boot.git / blobdiff