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Differential D23156 Diff 66697 sys/powerpc/ofw/ofw_initrd.c

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sys/powerpc/ofw/ofw_initrd.c

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#include <sys/module.h> #include <sys/module.h>
#include <sys/types.h> #include <sys/types.h>
#include <sys/proc.h> #include <sys/proc.h>
#include <vm/vm.h> #include <vm/vm.h>
#include <vm/pmap.h> #include <vm/pmap.h>
#include <machine/bus.h> #include <machine/bus.h>
#include <machine/elf.h>
#include <machine/param.h>
#include <dev/ofw/openfirm.h> #include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h> #include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h> #include <dev/ofw/ofw_bus_subr.h>
#include "opt_md.h" #include "opt_md.h"
extern u_char *mfs_root; extern u_char *mfs_root;
extern int mfs_root_size; extern int mfs_root_size;
static void ofw_initrd_probe_and_attach(void *junk); static void ofw_initrd_probe_and_attach(void *junk);
SYSINIT(ofw_initrd_probe_and_attach, SI_SUB_KMEM, SI_ORDER_ANY, SYSINIT(ofw_initrd_probe_and_attach, SI_SUB_KMEM, SI_ORDER_ANY,
ofw_initrd_probe_and_attach, NULL); ofw_initrd_probe_and_attach, NULL);
static void static void
ofw_initrd_probe_and_attach(void *junk) ofw_initrd_probe_and_attach(void *junk)
{ {
phandle_t chosen; phandle_t chosen;
vm_paddr_t start, end; vm_paddr_t start, end;
pcell_t cell[2]; pcell_t cell[2];
ssize_t size; ssize_t size;
u_char *taste;
Elf_Ehdr ehdr;
if (!hw_direct_map) if (!hw_direct_map)
return; return;
chosen = OF_finddevice("/chosen"); chosen = OF_finddevice("/chosen");
if (chosen <= 0) if (chosen <= 0)
return; return;
Show All 17 Linesofw_initrd_probe_and_attach(void *junk)
else if (size == 8) else if (size == 8)
end = (uint64_t)cell[0] << 32 | cell[1]; end = (uint64_t)cell[0] << 32 | cell[1];
else{ else{
printf("ofw_initrd: Wrong linux,initrd-end size\n"); printf("ofw_initrd: Wrong linux,initrd-end size\n");
return; return;
} }
if (end - start > 0) { if (end - start > 0) {
mfs_root = (u_char *) PHYS_TO_DMAP(start); taste = (u_char*) PHYS_TO_DMAP(start);
memcpy(&ehdr, taste, sizeof(ehdr));
bdragonAuthorUnsubmitted
Done
Inline Actions

This memcpy is for alignment reasons.

bdragon: This memcpy is for alignment reasons.
if (IS_ELF(ehdr)) {
printf("ofw_initrd: initrd is kernel image!\n");
return;
}
mfs_root = taste;
mfs_root_size = end - start; mfs_root_size = end - start;
printf("ofw_initrd: initrd loaded at 0x%08lx-0x%08lx\n", printf("ofw_initrd: initrd loaded at 0x%08lx-0x%08lx\n",
start, end); start, end);
} }
} }