57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
#if bios == 1
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#include <lib/print.h>
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#include <lib/real.h>
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#include <pxe/pxe.h>
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#include <lib/libc.h>
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#include <lib/blib.h>
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#include <mm/pmm.h>
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void set_pxe_fp(uint32_t fp);
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struct volume *pxe_bind_volume(void) {
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struct volume *volume = ext_mem_alloc(sizeof(struct volume));
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volume->pxe = true;
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return volume;
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}
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void pxe_init(void) {
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//pxe installation check
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struct rm_regs r = { 0 };
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r.ebx = 0;
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r.ecx = 0;
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r.eax = 0x5650;
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r.es = 0;
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rm_int(0x1a, &r, &r);
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if ((r.eax & 0xffff) != 0x564e) {
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panic(false, "PXE installation check failed");
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}
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struct pxenv* pxenv = { 0 };
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pxenv = (struct pxenv*)((r.es << 4) + (r.ebx & 0xffff));
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if (memcmp(pxenv->signature, PXE_SIGNATURE, sizeof(pxenv->signature)) != 0) {
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panic(false, "PXENV structure signature corrupted");
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}
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if (pxenv->version < 0x201) {
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//we won't support pxe < 2.1, grub does this too and it seems to work fine
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panic(false, "pxe version too old");
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}
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struct bangpxe* bangpxe = (struct bangpxe*)((((pxenv->pxe_ptr & 0xffff0000) >> 16) << 4) + (pxenv->pxe_ptr & 0xffff));
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if (memcmp(bangpxe->signature, PXE_BANGPXE_SIGNATURE,
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sizeof(bangpxe->signature))
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!= 0) {
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panic(false, "!pxe signature corrupted");
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}
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set_pxe_fp(bangpxe->rm_entry);
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printv("pxe: Successfully initialized\n");
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}
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#endif
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