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/*
* Raw bootcode loader (CHRP/Apple %BOOT)
* Written by Mark Cave-Ayland 2013
*/
#include "config.h"
#include "kernel/kernel.h"
#include "libopenbios/bindings.h"
#include "libopenbios/bootcode_load.h"
#include "libc/diskio.h"
#include "drivers/drivers.h"
#define printf printk
#define debug printk
int
bootcode_load(ihandle_t dev)
{
int retval = -1, count = 0, fd;
unsigned long bootcode, loadbase, entry, size, offset;
ihandle_t bootcode_info;
/* Mark the saved-program-state as invalid */
feval("0 state-valid !");
fd = open_ih(dev);
if (fd == -1) {
goto out;
}
/* If we don't have the get-bootcode-info word then we don't support
loading bootcode via %BOOT */
bootcode_info = find_ih_method("get-bootcode-info", dev);
if (!bootcode_info) {
goto out;
}
/* Default to loading at load-base */
fword("load-base");
loadbase = POP();
entry = loadbase;
size = 0;
#ifdef CONFIG_PPC
/*
* Apple OF does not honor load-base and instead uses pmBootLoad
* value from the boot partition descriptor.
*
* Tested with:
* a debian image with QUIK installed
* a debian image with iQUIK installed (https://github.com/andreiw/quik)
* an IQUIK boot floppy
* a NetBSD boot floppy (boots stage 2)
*/
if (is_apple()) {
PUSH(bootcode_info);
fword("execute");
loadbase = POP();
entry = POP();
size = POP();
}
#endif
bootcode = loadbase;
offset = 0;
while(1) {
if (seek_io(fd, offset) == -1)
break;
count = read_io(fd, (void *)bootcode, 512);
offset += count;
bootcode += count;
}
/* If we didn't read anything then exit */
if (!count) {
goto out;
}
/* Use proper file size if we got it from bootcode info */
if (size == 0) {
size = offset;
}
/* Initialise saved-program-state */
PUSH(entry);
feval("saved-program-state >sps.entry !");
PUSH(size);
feval("saved-program-state >sps.file-size !");
feval("bootcode saved-program-state >sps.file-type !");
feval("-1 state-valid !");
out:
close_io(fd);
return retval;
}
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