This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / m68knommu / platform / 68328 / head-ram.S

diff --git a/arch/m68knommu/platform/68328/head-ram.S b/arch/m68knommu/platform/68328/head-ram.S
new file mode 100644 (file)
index 0000000..6bdc9bc
--- /dev/null
+++ b/arch/m68knommu/platform/68328/head-ram.S
@@ -0,0 +1,171 @@
+#include <linux/config.h>
+
+       .global __main
+       .global __ram_start
+       .global __ram_end
+       .global __rom_start
+       .global __rom_end
+
+        .global _rambase
+        .global _ramstart
+       
+       .global splash_bits
+       .global _start
+       .global _stext
+
+#define DEBUG
+#define ROM_OFFSET 0x10C00000
+#define STACK_GAURD 0x10
+
+       .text
+       
+_start:
+_stext:
+       movew   #0x2700, %sr            /* Exceptions off! */
+
+#if 0
+       /* Init chip registers.  uCsimm specific */
+       moveb   #0x00,   0xfffffb0b     /* Watchdog off */
+       moveb   #0x10,   0xfffff000     /* SCR */
+
+       movew   #0x2400, 0xfffff200     /* PLLCR */
+       movew   #0x0123, 0xfffff202     /* PLLFSR */
+
+       moveb   #0x00,   0xfffff40b     /* enable chip select */
+       moveb   #0x00,   0xfffff423     /* enable /DWE */
+       moveb   #0x08,   0xfffffd0d     /* disable hardmap */
+       moveb   #0x07,   0xfffffd0e     /* level 7 interrupt clear */
+
+       movew   #0x8600, 0xfffff100     /* FLASH at 0x10c00000 */
+       movew   #0x018b, 0xfffff110     /* 2Meg, enable, 0ws */
+
+       movew   #0x8f00, 0xfffffc00     /* DRAM configuration */
+       movew   #0x9667, 0xfffffc02     /* DRAM control */
+       movew   #0x0000, 0xfffff106     /* DRAM at 0x00000000 */
+       movew   #0x068f, 0xfffff116     /* 8Meg, enable, 0ws */
+
+       moveb   #0x40,   0xfffff300     /* IVR */
+       movel   #0x007FFFFF, %d0        /* IMR */
+       movel   %d0,     0xfffff304
+
+       moveb   0xfffff42b, %d0
+       andb    #0xe0,   %d0
+       moveb   %d0,     0xfffff42b
+
+       moveb   #0x08,   0xfffff907     /* Ignore CTS */
+       movew   #0x010b, 0xfffff902     /* BAUD to 9600 */
+       movew   #0xe100, 0xfffff900     /* enable */
+#endif
+
+       movew   #16384, %d0  /* PLL settle wait loop */
+L0:
+       subw    #1, %d0
+       bne     L0
+#ifdef DEBUG
+       moveq   #70, %d7                /* 'F' */
+       moveb   %d7,0xfffff907          /* No absolute addresses */
+pclp1:
+       movew   0xfffff906, %d7
+       andw    #0x2000, %d7
+       beq     pclp1
+#endif /* DEBUG */
+
+#ifdef CONFIG_RELOCATE
+       /* Copy me to RAM */
+       moveal  #__rom_start, %a0
+       moveal  #__ram_start, %a1
+       moveal  #_edata, %a2
+
+       /* Copy %a0 to %a1 until %a1 == %a2 */
+LD1:
+       movel   %a0@+, %d0
+       movel   %d0, %a1@+
+       cmpal   %a1, %a2
+       bhi     LD1
+       
+#ifdef DEBUG
+       moveq   #74, %d7                /* 'J' */
+       moveb   %d7,0xfffff907          /* No absolute addresses */
+pclp2:
+       movew   0xfffff906, %d7
+       andw    #0x2000, %d7
+       beq     pclp2
+#endif /* DEBUG */
+       /* jump into the RAM copy */
+       jmp     ram_jump
+ram_jump:
+
+#endif /* CONFIG_RELOCATE */
+
+#ifdef DEBUG
+       moveq   #82, %d7                /* 'R' */
+       moveb   %d7,0xfffff907          /* No absolute addresses */
+pclp3:
+       movew   0xfffff906, %d7
+       andw    #0x2000, %d7
+       beq     pclp3
+#endif /* DEBUG */
+       moveal  #0x007ffff0, %ssp
+       moveal  #_sbss, %a0
+       moveal  #_ebss, %a1
+
+       /* Copy 0 to %a0 until %a0 >= %a1 */
+L1:
+       movel   #0, %a0@+
+       cmpal   %a0, %a1
+       bhi     L1
+
+#ifdef DEBUG
+       moveq   #67, %d7                /* 'C' */
+       jsr     putc
+#endif /* DEBUG */
+
+       pea     0
+       pea     env
+       pea     %sp@(4)
+       pea     0
+
+#ifdef DEBUG
+       moveq   #70, %d7                /* 'F' */
+       jsr     putc
+#endif /* DEBUG */
+
+lp:
+       jsr     start_kernel
+        jmp lp
+_exit:
+
+       jmp     _exit
+
+__main:
+       /* nothing */
+       rts
+
+#ifdef DEBUG
+putc:
+       moveb   %d7,0xfffff907
+pclp:
+       movew   0xfffff906, %d7
+       andw    #0x2000, %d7
+       beq     pclp
+       rts
+#endif /* DEBUG */
+
+       .data
+
+/*
+ *      Set up the usable of RAM stuff. Size of RAM is determined then
+ *      an initial stack set up at the end.
+ */
+.align 4
+_ramvec:
+.long   0
+_rambase:
+.long   0
+_ramstart:
+.long   0
+_ramend:
+.long   0
+
+env:
+       .long   0