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| author | Michael Brown | 2012-07-09 23:55:23 +0200 |
|---|---|---|
| committer | Michael Brown | 2015-04-21 00:35:13 +0200 |
| commit | fac651cb5f52f4dc2435c5c11ada06215a5b9ec9 (patch) | |
| tree | 84483181fd94b1740d0612386143cce2f9c5daca | |
| parent | [smp] Use highest free base memory page for SMP structures (diff) | |
| download | memtest86-fac651cb5f52f4dc2435c5c11ada06215a5b9ec9.tar.gz memtest86-fac651cb5f52f4dc2435c5c11ada06215a5b9ec9.tar.xz memtest86-fac651cb5f52f4dc2435c5c11ada06215a5b9ec9.zip | |
[pxe] Add memtest.0 target which can be loaded as a PXE NBP
Signed-off-by: Michael Brown <mcb30@ipxe.org>
| -rw-r--r-- | Makefile | 11 | ||||
| -rw-r--r-- | pxe.S | 77 |
2 files changed, 86 insertions, 2 deletions
@@ -20,7 +20,7 @@ OBJS= head.o reloc.o main.o test.o init.o lib.o patn.o screen_buffer.o \ smp.o vmem.o random.o -all: memtest.bin memtest +all: memtest.bin memtest memtest.0 # Link it statically once so I know I don't have undefined # symbols and then link it dynamically so I have full @@ -45,10 +45,17 @@ bootsect.s: bootsect.S config.h defs.h setup.s: setup.S config.h defs.h $(CC) -E -traditional $< -o $@ +pxe.s: pxe.S config.h defs.h + $(CC) -E -traditional $< -o $@ + memtest.bin: memtest_shared.bin bootsect.o setup.o memtest.bin.lds $(LD) -T memtest.bin.lds bootsect.o setup.o -b binary \ memtest_shared.bin -o memtest.bin +memtest.0: memtest_shared.bin pxe.o setup.o memtest.bin.lds + $(LD) -T memtest.bin.lds pxe.o setup.o -b binary \ + memtest_shared.bin -o memtest.0 + reloc.o: reloc.c $(CC) -c $(CFLAGS) -fno-strict-aliasing reloc.c @@ -64,7 +71,7 @@ build_number: clean: rm -f *.o *.s *.iso memtest.bin memtest memtest_shared \ - memtest_shared.bin memtest.iso + memtest_shared.bin memtest.iso memtest.0 iso: make all @@ -0,0 +1,77 @@ +/* + * pxe.S Copyright (C) 2012 Michael Brown <mcb30@ipxe.org> + * + * pxe.S is loaded at 0x7c00 by the PXE ROM. It copies the 32-bit + * portion to 0x10000 and jumps into setup.S. + */ + +#include "defs.h" + +#define RMSIZE (0x200 + 0x200*SETUPSECS) + +#define PXENV_ENTRY 0x0a +#define PXENV_UNDI_SHUTDOWN 0x0005 + +.code16 +.section ".bootsect", "ax", @progbits +.org 0 +_pxe: + +.globl _main +_main: + /* Canonicalise addresses */ + ljmp $BOOTSEG, $pxe_start + +pxe_start: + /* Store PXENV+ entry point */ + movl %es:PXENV_ENTRY(%bx), %eax + movl %eax, %cs:pxenv_vector + + /* Copy 32-bit portion to TSTLOAD:0000. Perform copy in + * reverse in 1kB blocks, since regions will overlap and we + * need to copy more than the 64kB real-mode segment limit. + */ + movw $_syssize, %bx /* Length is _syssize (paragraphs) */ + addw $63, %bx + andw $~63, %bx /* Round up to nearest kB */ + movw $(BOOTSEG + (RMSIZE >> 4)), %ax + addw %bx, %ax + movw %ax, %ds + movw $TSTLOAD, %ax + addw %bx, %ax + movw %ax, %es +1: movw %ds, %ax /* Decrement %ds and %es by 1kB */ + subw $64, %ax + movw %ax, %ds + movw %es, %ax + subw $64, %ax + movw %ax, %es + movw $256, %cx /* Copy 1kB block */ + xorw %si, %si + xorw %di, %di + cld + rep movsl + subw $64, %bx + jnz 1b + + /* Set up %ds and %es for access to local variables */ + movw %cs, %ax + movw %ax, %ds + movw %ax, %es + + /* Shutdown NIC */ + movw $PXENV_UNDI_SHUTDOWN, %bx + movw $pxenv_undi_shutdown, %di + lcall *pxenv_vector + + /* Jump to setup.S */ + ljmp $(BOOTSEG + 0x20), $0 + +pxenv_vector: + .word 0,0 + +pxenv_undi_shutdown: + .word 0 /* Status */ + +.org 512 +_epxe: |