mirror of
https://github.com/linuxboot/linuxboot
synced 2024-11-21 23:59:59 +00:00
68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/** \file
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* Tell DxeCore about an alternate firmware volume in the ROM.
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*
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* This allows LinuxBoot to locate the Linux kernel and initrd
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* outside of the normal DXE volume, which is quite small on some
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* systems.
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*/
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// #define VOLUME_ADDRESS 0xFF840000 // Winterfell
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// #define VOLUME_LENGTH 0x20000
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#define VOLUME_ADDRESS 0xFF500000
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#define VOLUME_LENGTH 0x00400000
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#include "serial.h"
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//#include "efi.h"
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#include <efi/efi.h>
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#include "efidxe.h"
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static void hexdump(uint64_t p, unsigned len)
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{
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for(unsigned i = 0 ; i < len ; i += 8)
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serial_hex(*(const uint64_t*)(p+i), 16);
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}
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EFI_STATUS
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EFIAPI
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efi_main(
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EFI_HANDLE image,
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EFI_SYSTEM_TABLE * const st
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)
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{
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(void) image;
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//gST = st;
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//gBS = gST->BootServices;
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//gRT = gST->RuntimeServices;
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const EFI_DXE_SERVICES * dxe_services = efi_find_table(st, 0x5ad34ba);
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if (!dxe_services)
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{
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serial_string("FvLoader: No DXE system table found...\r\n");
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return 0x80000001;
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}
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serial_string("FvLoader: adding firmware volume 0x");
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serial_hex(VOLUME_ADDRESS, 8);
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EFI_HANDLE handle;
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int rc = dxe_services->ProcessFirmwareVolume(
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(void*) VOLUME_ADDRESS,
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VOLUME_LENGTH,
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&handle
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);
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if (rc == 0)
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{
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serial_string("FVLoader: mapped 0x");
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serial_hex(VOLUME_LENGTH, 8);
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} else {
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serial_string("FvLoader: error rc="); serial_hex(rc, 8);
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hexdump(VOLUME_ADDRESS, 128);
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}
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return rc;
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}
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