#include "project.h"


void mbr_entry_show(MBR_entry *e)
{
printf("      flags  %02x start chs %5d/%3d/%2d start sector %10d\n",
	e->bootable,
	MBR_CYLINDER(e->chs_start.cs),
	e->chs_start.head,
	MBR_SECTOR(e->chs_start.cs),
	e->start);

printf("      system %02x end   chs %5d/%3d/%2d end   sector %10d\n",
	e->system,
	MBR_CYLINDER(e->chs_end.cs),
	e->chs_end.head,
	MBR_SECTOR(e->chs_end.cs),
	e->size+e->start);
}
void mbr_show(MBR *m)
{
int i;

printf("  PMBR:\n");

for (i=0;i<4;++i) {
if (m->entry[i].system) {
printf("    Entry %d:\n",i);
mbr_entry_show(&m->entry[i]);
}
}
if (memcmp(m->signature,MBR_SIGNATURE,sizeof(m->signature))) {
printf("    Signature INVALID\n");
} else {
printf("    Signature valid\n");
}
}

MBR mbr_new(uint64_t lbas)
{
uint64_t cyls=lbas;
MBR ret={0};

cyls=cyls/(63*255);
if (cyls>1023) cyls=1023;

ret.entry[0].bootable=0;
ret.entry[0].chs_start.cs=MBR_CS(0,1);
ret.entry[0].system=MBR_PARTITION_TYPE_EFI;
ret.entry[0].chs_end.head=254;
ret.entry[0].chs_end.cs=MBR_CS(cyls,63);
ret.entry[0].start=1;
ret.entry[0].size=lbas-1;

memcpy(ret.signature,MBR_SIGNATURE,sizeof(ret.signature));

return ret;
}