| /* |
| * linux/arch/m68knommu/platform/68328/head-rom.S |
| * - A startup file for the MC68328 |
| * |
| * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>, |
| * Kenneth Albanowski <kjahds@kjahds.com>, |
| * The Silver Hammer Group, Ltd. |
| * |
| * (c) 1995, Dionne & Associates |
| * (c) 1995, DKG Display Tech. |
| */ |
| |
| #define ASSEMBLY |
| |
| #define IMMED # |
| #define DBG_PUTC(x) moveb IMMED x, 0xfffff907 |
| |
| #include <linux/config.h> |
| |
| .global _stext |
| .global _start |
| |
| .global _rambase |
| .global _ramvec |
| .global _ramstart |
| .global _ramend |
| |
| .global penguin_bits |
| |
| #ifdef CONFIG_PILOT |
| |
| #define IMR 0xFFFFF304 |
| |
| .data |
| .align 16 |
| |
| penguin_bits: |
| #include "bootlogo.rh" |
| |
| #endif |
| |
| /*****************************************************************************/ |
| |
| .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 |
| |
| .text |
| |
| _start: |
| _stext: |
| |
| |
| #ifdef CONFIG_M68328 |
| |
| #ifdef CONFIG_PILOT |
| .byte 0x4e, 0xfa, 0x00, 0x0a /* Jmp +X bytes */ |
| .byte 'b', 'o', 'o', 't' |
| .word 10000 |
| |
| nop |
| #endif |
| |
| moveq #0, %d0 |
| movew %d0, 0xfffff618 /* Watchdog off */ |
| movel #0x00011f07, 0xfffff114 /* CS A1 Mask */ |
| |
| movew #0x0800, 0xfffff906 /* Ignore CTS */ |
| movew #0x010b, 0xfffff902 /* BAUD to 9600 */ |
| |
| movew #0x2410, 0xfffff200 /* PLLCR */ |
| movew #0x123, 0xfffff202 /* PLLFSR */ |
| |
| #ifdef CONFIG_PILOT |
| moveb #0, 0xfffffA27 /* LCKCON */ |
| movel #_start, 0xfffffA00 /* LSSA */ |
| moveb #0xa, 0xfffffA05 /* LVPW */ |
| movew #0x9f, 0xFFFFFa08 /* LXMAX */ |
| movew #0x9f, 0xFFFFFa0a /* LYMAX */ |
| moveb #9, 0xfffffa29 /* LBAR */ |
| moveb #0, 0xfffffa25 /* LPXCD */ |
| moveb #0x04, 0xFFFFFa20 /* LPICF */ |
| moveb #0x58, 0xfffffA27 /* LCKCON */ |
| moveb #0x85, 0xfffff429 /* PFDATA */ |
| moveb #0xd8, 0xfffffA27 /* LCKCON */ |
| moveb #0xc5, 0xfffff429 /* PFDATA */ |
| moveb #0xd5, 0xfffff429 /* PFDATA */ |
| |
| moveal #0x00100000, %a3 |
| moveal #0x100ffc00, %a4 |
| #endif /* CONFIG_PILOT */ |
| |
| #endif /* CONFIG_M68328 */ |
| |
| movew #0x2700, %sr |
| lea %a4@(-4), %sp |
| |
| DBG_PUTC('\r') |
| DBG_PUTC('\n') |
| DBG_PUTC('A') |
| |
| moveq #0,%d0 |
| movew #16384, %d0 /* PLL settle wait loop */ |
| L0: |
| subw #1, %d0 |
| bne L0 |
| |
| DBG_PUTC('B') |
| |
| /* Copy command line from beginning of RAM (+16) to end of bss */ |
| movel #CONFIG_VECTORBASE, %d7 |
| addl #16, %d7 |
| moveal %d7, %a0 |
| moveal #_ebss, %a1 |
| lea %a1@(512), %a2 |
| |
| DBG_PUTC('C') |
| |
| /* Copy %a0 to %a1 until %a1 == %a2 */ |
| L2: |
| movel %a0@+, %d0 |
| movel %d0, %a1@+ |
| cmpal %a1, %a2 |
| bhi L2 |
| |
| /* Copy data+init segment from ROM to RAM */ |
| moveal #_etext, %a0 |
| moveal #_sdata, %a1 |
| moveal #__init_end, %a2 |
| |
| DBG_PUTC('D') |
| |
| /* Copy %a0 to %a1 until %a1 == %a2 */ |
| LD1: |
| movel %a0@+, %d0 |
| movel %d0, %a1@+ |
| cmpal %a1, %a2 |
| bhi LD1 |
| |
| DBG_PUTC('E') |
| |
| moveal #_sbss, %a0 |
| moveal #_ebss, %a1 |
| |
| /* Copy 0 to %a0 until %a0 == %a1 */ |
| L1: |
| movel #0, %a0@+ |
| cmpal %a0, %a1 |
| bhi L1 |
| |
| DBG_PUTC('F') |
| |
| /* Copy command line from end of bss to command line */ |
| moveal #_ebss, %a0 |
| moveal #command_line, %a1 |
| lea %a1@(512), %a2 |
| |
| DBG_PUTC('G') |
| |
| /* Copy %a0 to %a1 until %a1 == %a2 */ |
| L3: |
| movel %a0@+, %d0 |
| movel %d0, %a1@+ |
| cmpal %a1, %a2 |
| bhi L3 |
| |
| movel #_sdata, %d0 |
| movel %d0, _rambase |
| movel #_ebss, %d0 |
| movel %d0, _ramstart |
| |
| movel %a4, %d0 |
| subl #4096, %d0 /* Reserve 4K of stack */ |
| moveq #79, %d7 |
| movel %d0, _ramend |
| |
| movel %a3, %d0 |
| movel %d0, rom_length |
| |
| pea 0 |
| pea env |
| pea %sp@(4) |
| pea 0 |
| |
| DBG_PUTC('H') |
| |
| #ifdef CONFIG_PILOT |
| movel #penguin_bits, 0xFFFFFA00 |
| moveb #10, 0xFFFFFA05 |
| movew #160, 0xFFFFFA08 |
| movew #160, 0xFFFFFA0A |
| #endif /* CONFIG_PILOT */ |
| |
| DBG_PUTC('I') |
| |
| lea init_thread_union, %a0 |
| lea 0x2000(%a0), %sp |
| |
| DBG_PUTC('J') |
| DBG_PUTC('\r') |
| DBG_PUTC('\n') |
| |
| jsr start_kernel |
| _exit: |
| |
| jmp _exit |
| |
| |
| .data |
| env: |
| .long 0 |
