#include <unistd.h>
#include <string.h>
+/* CHRP note section */
char arch[] = "PowerPC";
#define N_DESCR 6
0x4000, /* load-base */
};
+/* RPA note section */
+char rpaname[] = "IBM,RPA-Client-Config";
+
+/*
+ * Note: setting ignore_my_client_config *should* mean that OF ignores
+ * all the other fields, but there is a firmware bug which means that
+ * it looks at the splpar field at least. So these values need to be
+ * reasonable.
+ */
+#define N_RPA_DESCR 8
+unsigned int rpanote[N_RPA_DESCR] = {
+ 0, /* lparaffinity */
+ 64, /* min_rmo_size */
+ 0, /* min_rmo_percent */
+ 40, /* max_pft_size */
+ 1, /* splpar */
+ -1, /* min_load */
+ 0, /* new_mem_def */
+ 1, /* ignore_my_client_config */
+};
+
+#define ROUNDUP(len) (((len) + 3) & ~3)
+
unsigned char buf[512];
#define GET_16BE(off) ((buf[off] << 8) + (buf[(off)+1]))
{
int fd, n, i;
int ph, ps, np;
- int nnote, ns;
+ int nnote, nnote2, ns;
if (ac != 2) {
fprintf(stderr, "Usage: %s elf-file\n", av[0]);
exit(1);
}
- nnote = strlen(arch) + 1 + (N_DESCR + 3) * 4;
+ nnote = 12 + ROUNDUP(strlen(arch) + 1) + sizeof(descr);
+ nnote2 = 12 + ROUNDUP(strlen(rpaname) + 1) + sizeof(rpanote);
n = read(fd, buf, sizeof(buf));
if (n < 0) {
np = GET_16BE(E_PHNUM);
if (ph < E_HSIZE || ps < PH_HSIZE || np < 1)
goto notelf;
- if (ph + (np + 1) * ps + nnote > n)
+ if (ph + (np + 2) * ps + nnote + nnote2 > n)
goto nospace;
for (i = 0; i < np; ++i) {
}
/* XXX check that the area we want to use is all zeroes */
- for (i = 0; i < ps + nnote; ++i)
+ for (i = 0; i < 2 * ps + nnote + nnote2; ++i)
if (buf[ph + i] != 0)
goto nospace;
/* fill in the program header entry */
- ns = ph + ps;
+ ns = ph + 2 * ps;
PUT_32BE(ph + PH_TYPE, PT_NOTE);
PUT_32BE(ph + PH_OFFSET, ns);
PUT_32BE(ph + PH_FILESZ, nnote);
PUT_32BE(ns + 8, 0x1275);
strcpy(&buf[ns + 12], arch);
ns += 12 + strlen(arch) + 1;
- for (i = 0; i < N_DESCR; ++i)
- PUT_32BE(ns + i * 4, descr[i]);
+ for (i = 0; i < N_DESCR; ++i, ns += 4)
+ PUT_32BE(ns, descr[i]);
+
+ /* fill in the second program header entry and the RPA note area */
+ ph += ps;
+ PUT_32BE(ph + PH_TYPE, PT_NOTE);
+ PUT_32BE(ph + PH_OFFSET, ns);
+ PUT_32BE(ph + PH_FILESZ, nnote2);
+
+ /* fill in the note area we point to */
+ PUT_32BE(ns, strlen(rpaname) + 1);
+ PUT_32BE(ns + 4, sizeof(rpanote));
+ PUT_32BE(ns + 8, 0x12759999);
+ strcpy(&buf[ns + 12], rpaname);
+ ns += 12 + ROUNDUP(strlen(rpaname) + 1);
+ for (i = 0; i < N_RPA_DESCR; ++i, ns += 4)
+ PUT_32BE(ns, rpanote[i]);
/* Update the number of program headers */
- PUT_16BE(E_PHNUM, np + 1);
+ PUT_16BE(E_PHNUM, np + 2);
/* write back */
lseek(fd, (long) 0, SEEK_SET);
exit(0);
notelf:
- fprintf(stderr, "%s does not appear to be an ELF file\n", av[0]);
+ fprintf(stderr, "%s does not appear to be an ELF file\n", av[1]);
exit(1);
nospace:
fprintf(stderr, "sorry, I can't find space in %s to put the note\n",
- av[0]);
+ av[1]);
exit(1);
}
}
}
+/*
+ * To tell the firmware what our capabilities are, we have to pass
+ * it a fake 32-bit ELF header containing a couple of PT_NOTE sections
+ * that contain structures that contain the actual values.
+ */
+static struct fake_elf {
+ Elf32_Ehdr elfhdr;
+ Elf32_Phdr phdr[2];
+ struct chrpnote {
+ u32 namesz;
+ u32 descsz;
+ u32 type;
+ char name[8]; /* "PowerPC" */
+ struct chrpdesc {
+ u32 real_mode;
+ u32 real_base;
+ u32 real_size;
+ u32 virt_base;
+ u32 virt_size;
+ u32 load_base;
+ } chrpdesc;
+ } chrpnote;
+ struct rpanote {
+ u32 namesz;
+ u32 descsz;
+ u32 type;
+ char name[24]; /* "IBM,RPA-Client-Config" */
+ struct rpadesc {
+ u32 lpar_affinity;
+ u32 min_rmo_size;
+ u32 min_rmo_percent;
+ u32 max_pft_size;
+ u32 splpar;
+ u32 min_load;
+ u32 new_mem_def;
+ u32 ignore_me;
+ } rpadesc;
+ } rpanote;
+} fake_elf = {
+ .elfhdr = {
+ .e_ident = { 0x7f, 'E', 'L', 'F',
+ ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
+ .e_type = ET_EXEC, /* yeah right */
+ .e_machine = EM_PPC,
+ .e_version = EV_CURRENT,
+ .e_phoff = offsetof(struct fake_elf, phdr),
+ .e_phentsize = sizeof(Elf32_Phdr),
+ .e_phnum = 2
+ },
+ .phdr = {
+ [0] = {
+ .p_type = PT_NOTE,
+ .p_offset = offsetof(struct fake_elf, chrpnote),
+ .p_filesz = sizeof(struct chrpnote)
+ }, [1] = {
+ .p_type = PT_NOTE,
+ .p_offset = offsetof(struct fake_elf, rpanote),
+ .p_filesz = sizeof(struct rpanote)
+ }
+ },
+ .chrpnote = {
+ .namesz = sizeof("PowerPC"),
+ .descsz = sizeof(struct chrpdesc),
+ .type = 0x1275,
+ .name = "PowerPC",
+ .chrpdesc = {
+ .real_mode = ~0U, /* ~0 means "don't care" */
+ .real_base = ~0U,
+ .real_size = ~0U,
+ .virt_base = ~0U,
+ .virt_size = ~0U,
+ .load_base = ~0U
+ },
+ },
+ .rpanote = {
+ .namesz = sizeof("IBM,RPA-Client-Config"),
+ .descsz = sizeof(struct rpadesc),
+ .type = 0x12759999,
+ .name = "IBM,RPA-Client-Config",
+ .rpadesc = {
+ .lpar_affinity = 0,
+ .min_rmo_size = 64, /* in megabytes */
+ .min_rmo_percent = 0,
+ .max_pft_size = 48, /* 2^48 bytes max PFT size */
+ .splpar = 1,
+ .min_load = ~0U,
+ .new_mem_def = 0
+ }
+ }
+};
+
+static void __init prom_send_capabilities(void)
+{
+ unsigned long offset = reloc_offset();
+ ihandle elfloader;
+ int ret;
+
+ elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
+ if (elfloader == 0) {
+ prom_printf("couldn't open /packages/elf-loader\n");
+ return;
+ }
+ ret = call_prom("call-method", 3, 1, ADDR("process-elf-header"),
+ elfloader, ADDR(&fake_elf));
+ call_prom("close", 1, 0, elfloader);
+}
+
/*
* Memory allocation strategy... our layout is normally:
*
projects / linux-2.6 / commitdiff