1 files changed, 141 insertions, 0 deletions

diff --git a/arch/m68k/platform/68328/head-ram.S b/arch/m68k/platform/68328/head-ram.S
new file mode 100644
index 00000000000..7f1aeeacb21
--- /dev/null
+++ b/arch/m68k/platform/68328/head-ram.S
@@ -0,0 +1,141 @@
+
+        .global __main
+        .global __rom_start
+
+        .global _rambase
+        .global _ramstart
+        
+        .global splash_bits
+        .global _start
+        .global _stext
+        .global _edata
+
+#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 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