diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/i386/init/crt0.S.lb | 62 |
1 files changed, 55 insertions, 7 deletions
diff --git a/src/arch/i386/init/crt0.S.lb b/src/arch/i386/init/crt0.S.lb index 700b01148a..4d9face092 100644 --- a/src/arch/i386/init/crt0.S.lb +++ b/src/arch/i386/init/crt0.S.lb @@ -23,10 +23,8 @@ #include <arch/asm.h> #include <arch/intel.h> +#include <console/loglevel.h> -#if CONFIG_SMP==1 -#include <cpu/p6/apic.h> -#endif /* * This is the entry code the code in .reset section * jumps to this address. @@ -43,7 +41,8 @@ /* clear boot_complete flag */ xorl %ebp, %ebp __main: - CONSOLE_DEBUG_TX_STRING($str_copying_to_ram) + mov $str_copying_to_ram, %ebx + CALLSP(console_tx_string) /* * Copy data into RAM and clear the BSS. Since these segments @@ -53,7 +52,7 @@ __main: intel_chip_post_macro(0x11) /* post 11 */ cld /* clear direction flag */ - + /* copy linuxBIOS from it's initial load location to * the location it is compiled to run at. * Normally this is copying from FLASH ROM to RAM. @@ -149,8 +148,9 @@ decompr_end_n2b: movl %esp, %ebp #endif - - CONSOLE_DEBUG_TX_STRING($str_pre_main) + + mov $str_pre_main, %ebx + CALLSP(console_tx_string) leal _iseg, %edi jmp %edi @@ -159,7 +159,55 @@ decompr_end_n2b: hlt jmp .Lhlt + + /* Uses esp, ebx, ax, dx */ +console_tx_string: +#if ASM_CONSOLE_LOGLEVEL <= BIOS_DEBUG + RETSP +#else + mov (%ebx), %al + inc %ebx + cmp $0, %al + jne 9f + RETSP +9: +/* Base Address */ +#ifndef TTYS0_BASE +#define TTYS0_BASE 0x3f8 +#endif +/* Data */ +#define TTYS0_RBR (TTYS0_BASE+0x00) + +/* Control */ +#define TTYS0_TBR TTYS0_RBR +#define TTYS0_IER (TTYS0_BASE+0x01) +#define TTYS0_IIR (TTYS0_BASE+0x02) +#define TTYS0_FCR TTYS0_IIR +#define TTYS0_LCR (TTYS0_BASE+0x03) +#define TTYS0_MCR (TTYS0_BASE+0x04) +#define TTYS0_DLL TTYS0_RBR +#define TTYS0_DLM TTYS0_IER + +/* Status */ +#define TTYS0_LSR (TTYS0_BASE+0x05) +#define TTYS0_MSR (TTYS0_BASE+0x06) +#define TTYS0_SCR (TTYS0_BASE+0x07) + + mov %al, %ah +10: mov $TTYS0_LSR, %dx + inb %dx, %al + test $0x20, %al + je 10b + mov $TTYS0_TBR, %dx + mov %ah, %al + outb %al, %dx + + jmp console_tx_string + .section ".rom.data" str_copying_to_ram: .string "Copying LinuxBIOS to ram.\r\n" str_pre_main: .string "Jumping to LinuxBIOS.\r\n" .previous + +#endif /* ASM_CONSOLE_LOGLEVEL > BIOS_DEBUG */ +
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