UINTN kernel_size = 0x800000; /* 8M (default x86_64 bzImage size limit) */
+static VOID *
+bzImage_alloc()
+{
+ UINTN pages = EFI_SIZE_TO_PAGES(kernel_size);
+ int reloc_kernel = 0;
+ VOID *kla, *kend = kernel_start + kernel_size;
+ UINT32 kalign, kmask;
+ boot_params_t *ps = param_start;
+
+ /*
+ * Get address for kernel from header, if applicable & available.
+ */
+ if ((ps->s.hdr_major < 2) ||
+ (ps->s.hdr_major == 2 && ps->s.hdr_minor < 5)) {
+ reloc_kernel = 0;
+ } else {
+ if (ps->s.kernel_start >= DEFAULT_KERNEL_START)
+ kernel_start = (void *)(UINT64)ps->s.kernel_start;
+ reloc_kernel = ps->s.relocatable_kernel;
+ kalign = ps->s.kernel_alignment;
+ kmask = kalign - 1;
+ VERB_PRT(3, Print(L"kernel header (%d.%d) suggests kernel "
+ "start at address "PTR_FMT" (%srelocatable!)\n",
+ ps->s.hdr_major, ps->s.hdr_minor, ps->s.kernel_start,
+ (reloc_kernel ? L"": L"not ")));
+ }
+
+ /*
+ * Best effort for old (< 2.6.20) and non-relocatable kernels
+ */
+ if (alloc_kmem(kernel_start, pages) == 0) {
+ VERB_PRT(3, Print(L"kernel_start: "PTR_FMT" kernel_size: %d\n",
+ kernel_start, kernel_size));
+ return kernel_start;
+ } else if ( ! reloc_kernel ) {
+ /*
+ * Couldn't get desired address--just load it anywhere and
+ * (try to) move it later. It's the only chance for non-
+ * relocatable kernels, but it breaks occassionally...
+ */
+ ERR_PRT((L"Kernel header (%d.%d) suggests kernel "
+ "start at address "PTR_FMT" (non relocatable!)\n"
+ "This address is not available, so an attempt"
+ "is made to copy the kernel there later on\n"
+ "BEWARE: this is unsupported and may not work. "
+ "Please update your kernel.\n",
+ ps->s.hdr_major, ps->s.hdr_minor, ps->s.kernel_start));
+ kla = (VOID *)(UINT32_MAX - kernel_size);
+ /* NULL would preserve the "anywhere" semantic, */
+ /* but it would not prevent allocation above 4GB! */
+
+ if (alloc_kmem_anywhere(&kla, pages) != 0) {
+ /* out of luck */
+ return NULL;
+ }
+ VERB_PRT(3, Print(L"kernel_start: "PTR_FMT
+ " kernel_size: %d loading at: "PTR_FMT"\n",
+ kernel_start, kernel_size, kla));
+ return kla;
+ }
+
+
+ /* Is 'ps->s.kernel_alignment' guaranteed to be sane? */
+ if (kalign < EFI_PAGE_SIZE) {
+ kalign = EFI_PAGE_SIZE;
+ kmask = EFI_PAGE_MASK;
+ }
+ DBG_PRT((L"alignment: kernel=0x%x efi_page=0x%x : 0x%x\n",
+ ps->s.kernel_alignment, EFI_PAGE_SIZE, kalign));
+
+ /*
+ * Couldn't get the preferred address, but luckily it's
+ * a relocatable kernel, so ...
+ *
+ * 1. use 'find_kernel_memory()' (like Itanium)
+ * 2. try out the 16 lowest possible aligned addresses (> 0)
+ * 3. get enough memory to align "creatively"
+ * 4. forget alignment (and start praying)...
+ */
+
+ /* 1. */
+ if ((find_kernel_memory(kernel_start, kend, kalign, &kla) != 0) ||
+ (alloc_kmem(kla, pages) != 0)) {
+ kla = NULL;
+ }
+
+ /* 2. */
+ if ( ! kla && (UINT64)kernel_start < kalign ) {
+ int i;
+ for ( i = 1; i < 16 && !kla; i++ ) {
+ VOID *tmp = (VOID *)((UINT64)kalign * i);
+ if (alloc_kmem(tmp, pages) == 0) {
+ kla = tmp;
+ }
+ }
+ }
+
+ /* 3. */
+ if ( ! kla ) {
+ UINTN apages = EFI_SIZE_TO_PAGES(kernel_size + kmask);
+ kla = (VOID *)(UINT32_MAX - kernel_size - kmask);
+
+ if (alloc_kmem_anywhere(&kla, apages) == 0) {
+ kla = (VOID *)(((UINT64)kla + kmask) & ~kmask);
+ } else {
+ kla = NULL;
+ }
+ }
+
+ /* 4. last resort */
+ if ( ! kla ) {
+ kla = (VOID *)(UINT32_MAX - kernel_size);
+ if (alloc_kmem_anywhere(&kla, pages) != 0) {
+ return NULL;
+ }
+ }
+
+ kernel_start = kla;
+ VERB_PRT(1, Print(L"relocating kernel_start: "PTR_FMT
+ " kernel_size: %d\n", kernel_start, kernel_size));
+ return kla;
+}
+
static INTN
bzImage_probe(CHAR16 *kname)
{
* Allocate memory for kernel.
*/
- /*
- * Get correct address for kernel from header, if applicable & available.
- */
- if ((param_start->s.hdr_major == 2) &&
- (param_start->s.hdr_minor >= 6) &&
- (param_start->s.kernel_start >= DEFAULT_KERNEL_START)) {
- kernel_start = (void *)param_start->s.kernel_start;
- VERB_PRT(3, Print(L"kernel header suggests kernel start at address "PTR_FMT"\n",
- kernel_start));
- }
-
- kernel_load_address = kernel_start;
-
- if (alloc_kmem(kernel_start, EFI_SIZE_TO_PAGES(kernel_size)) != 0) {
- /*
- * Couldn't get desired address--just load it anywhere and move it later.
- * (Easier than relocating kernel, and also works with non-relocatable kernels.)
- */
- if (alloc_kmem_anywhere(&kernel_load_address, EFI_SIZE_TO_PAGES(kernel_size)) != 0) {
- ERR_PRT((L"Could not allocate memory for kernel."));
- free(param_start);
- param_start = NULL;
- param_size = 0;
- fops_close(fd);
- return -1;
- }
+ kernel_load_address = bzImage_alloc();
+ if ( ! kernel_load_address ) {
+ ERR_PRT((L"Could not allocate memory for kernel."));
+ free(param_start);
+ param_start = NULL;
+ param_size = 0;
+ fops_close(fd);
+ return -1;
}
- VERB_PRT(3, Print(L"kernel_start: "PTR_FMT" kernel_size: %d loading at: "PTR_FMT"\n",
- kernel_start, kernel_size, kernel_load_address));
-
/*
* Now read the rest of the kernel image into memory.
*/
- DBG_PRT((L"reading kernel image...\n"));
+ Print(L"Loading kernel %s... ", kname);
size = kernel_size;
efi_status = fops_read(fd, kernel_load_address, &size);
if (EFI_ERROR(efi_status) || size < 0x10000) {
- ERR_PRT((L"Error reading kernel image %s.", kname));
+ ERR_PRT((L"Error reading kernel image (0x%x).", efi_status));
free(param_start);
param_start = NULL;
param_size = 0;
fops_close(fd);
free_kmem();
return -1;
+ } else {
+ Print(L" done\n");
}
DBG_PRT((L"kernel image read: %d bytes, %d Kbytes\n", size, size / 1024));
projects / debian / elilo / blobdiff