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grub/loader/i386/xnu.c
phcoder 975146895c missing part of previous commit
2009-09-04 13:50:32 +00:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/env.h>
#include <grub/file.h>
#include <grub/disk.h>
#include <grub/xnu.h>
#include <grub/cpu/xnu.h>
#include <grub/mm.h>
#include <grub/loader.h>
#include <grub/autoefi.h>
#include <grub/i386/tsc.h>
#include <grub/i386/pit.h>
#include <grub/misc.h>
#include <grub/term.h>
char grub_xnu_cmdline[1024];
/* Aliases set for some tables. */
struct tbl_alias
{
grub_efi_guid_t guid;
char *name;
};
struct tbl_alias table_aliases[] =
{
{GRUB_EFI_ACPI_20_TABLE_GUID, "ACPI_20"},
{GRUB_EFI_ACPI_TABLE_GUID, "ACPI"},
};
/* The following function is used to be able to debug xnu loader
with grub-emu. */
#ifdef GRUB_UTIL
static grub_err_t
grub_xnu_launch (void)
{
grub_printf ("Fake launch %x:%p:%p", grub_xnu_entry_point, grub_xnu_arg1,
grub_xnu_stack);
grub_getkey ();
return 0;
}
#else
static void (*grub_xnu_launch) (void) = 0;
#endif
static int
utf16_strlen (grub_uint16_t *in)
{
int i;
for (i = 0; in[i]; i++);
return i;
}
/* Read frequency from a string in MHz and return it in Hz. */
static grub_uint64_t
readfrequency (const char *str)
{
grub_uint64_t num = 0;
int mul = 1000000;
int found = 0;
while (*str)
{
unsigned long digit;
digit = grub_tolower (*str) - '0';
if (digit > 9)
break;
found = 1;
num = num * 10 + digit;
str++;
}
num *= 1000000;
if (*str == '.')
{
str++;
while (*str)
{
unsigned long digit;
digit = grub_tolower (*str) - '0';
if (digit > 9)
break;
found = 1;
mul /= 10;
num = num + mul * digit;
str++;
}
}
if (! found)
return 0;
return num;
}
/* Thanks to Kabyl for precious information about Intel architecture. */
static grub_uint64_t
guessfsb (void)
{
const grub_uint64_t sane_value = 100000000;
grub_uint32_t manufacturer[3], max_cpuid, capabilities, msrlow;
grub_uint64_t start_tsc;
grub_uint64_t end_tsc;
grub_uint64_t tsc_ticks_per_ms;
if (! grub_cpu_is_cpuid_supported ())
return sane_value;
#ifdef APPLE_CC
asm volatile ("movl $0, %%eax\n"
#ifdef __x86_64__
"push %%rbx\n"
#else
"push %%ebx\n"
#endif
"cpuid\n"
#ifdef __x86_64__
"pop %%rbx\n"
#else
"pop %%ebx\n"
#endif
: "=a" (max_cpuid),
"=d" (manufacturer[1]), "=c" (manufacturer[2]));
/* Only Intel for now is done. */
if (grub_memcmp (manufacturer + 1, "ineIntel", 12) != 0)
return sane_value;
#else
asm volatile ("movl $0, %%eax\n"
"cpuid"
: "=a" (max_cpuid), "=b" (manufacturer[0]),
"=d" (manufacturer[1]), "=c" (manufacturer[2]));
/* Only Intel for now is done. */
if (grub_memcmp (manufacturer, "GenuineIntel", 12) != 0)
return sane_value;
#endif
/* Check Speedstep. */
if (max_cpuid < 1)
return sane_value;
#ifdef APPLE_CC
asm volatile ("movl $1, %%eax\n"
#ifdef __x86_64__
"push %%rbx\n"
#else
"push %%ebx\n"
#endif
"cpuid\n"
#ifdef __x86_64__
"pop %%rbx\n"
#else
"pop %%ebx\n"
#endif
: "=c" (capabilities):
: "%rax", "%rdx");
#else
asm volatile ("movl $1, %%eax\n"
"cpuid"
: "=c" (capabilities):
: "%rax", "%rbx", "%rdx");
#endif
if (! (capabilities & (1 << 7)))
return sane_value;
/* Calibrate the TSC rate. */
start_tsc = grub_get_tsc ();
grub_pit_wait (0xffff);
end_tsc = grub_get_tsc ();
tsc_ticks_per_ms = grub_divmod64 (end_tsc - start_tsc, 55, 0);
/* Read the multiplier. */
asm volatile ("movl $0x198, %%ecx\n"
"rdmsr"
: "=d" (msrlow)
:
: "%ecx", "%eax");
return grub_divmod64 (2000 * tsc_ticks_per_ms,
((msrlow >> 7) & 0x3e) + ((msrlow >> 14) & 1), 0);
}
/* Fill device tree. */
/* FIXME: some entries may be platform-agnostic. Move them to loader/xnu.c. */
grub_err_t
grub_cpu_xnu_fill_devicetree (void)
{
struct grub_xnu_devtree_key *efikey;
struct grub_xnu_devtree_key *cfgtablekey;
struct grub_xnu_devtree_key *curval;
struct grub_xnu_devtree_key *runtimesrvkey;
struct grub_xnu_devtree_key *platformkey;
unsigned i, j;
grub_err_t err;
err = grub_autoefi_prepare ();
if (err)
return err;
/* The value "model". */
/* FIXME: may this value be sometimes different? */
curval = grub_xnu_create_value (&grub_xnu_devtree_root, "model");
if (! curval)
return grub_errno;
curval->datasize = sizeof ("ACPI");
curval->data = grub_strdup ("ACPI");
curval = grub_xnu_create_value (&grub_xnu_devtree_root, "compatible");
if (! curval)
return grub_errno;
curval->datasize = sizeof ("ACPI");
curval->data = grub_strdup ("ACPI");
/* The key "efi". */
efikey = grub_xnu_create_key (&grub_xnu_devtree_root, "efi");
if (! efikey)
return grub_errno;
/* Information about firmware. */
curval = grub_xnu_create_value (&(efikey->first_child), "firmware-revision");
if (! curval)
return grub_errno;
curval->datasize = (SYSTEM_TABLE_SIZEOF (firmware_revision));
curval->data = grub_malloc (curval->datasize);
if (! curval->data)
return grub_errno;
grub_memcpy (curval->data, (SYSTEM_TABLE_VAR(firmware_revision)),
curval->datasize);
curval = grub_xnu_create_value (&(efikey->first_child), "firmware-vendor");
if (! curval)
return grub_errno;
curval->datasize =
2 * (utf16_strlen (SYSTEM_TABLE_PTR (firmware_vendor)) + 1);
curval->data = grub_malloc (curval->datasize);
if (! curval->data)
return grub_errno;
grub_memcpy (curval->data, SYSTEM_TABLE_PTR (firmware_vendor),
curval->datasize);
curval = grub_xnu_create_value (&(efikey->first_child), "firmware-abi");
if (! curval)
return grub_errno;
curval->datasize = sizeof ("EFI32");
curval->data = grub_malloc (curval->datasize);
if (! curval->data)
return grub_errno;
if (SIZEOF_OF_UINTN == 4)
grub_memcpy (curval->data, "EFI32", curval->datasize);
else
grub_memcpy (curval->data, "EFI64", curval->datasize);
/* The key "platform". */
platformkey = grub_xnu_create_key (&(efikey->first_child),
"platform");
if (! platformkey)
return grub_errno;
/* Pass FSB frequency to the kernel. */
curval = grub_xnu_create_value (&(platformkey->first_child), "FSBFrequency");
if (! curval)
return grub_errno;
curval->datasize = sizeof (grub_uint64_t);
curval->data = grub_malloc (curval->datasize);
if (!curval->data)
return grub_errno;
/* First see if user supplies the value. */
char *fsbvar = grub_env_get ("fsb");
if (! fsbvar)
*((grub_uint64_t *) curval->data) = 0;
else
*((grub_uint64_t *) curval->data) = readfrequency (fsbvar);
/* Try autodetect. */
if (! *((grub_uint64_t *) curval->data))
*((grub_uint64_t *) curval->data) = guessfsb ();
grub_dprintf ("xnu", "fsb autodetected as %llu\n",
(unsigned long long) *((grub_uint64_t *) curval->data));
cfgtablekey = grub_xnu_create_key (&(efikey->first_child),
"configuration-table");
if (!cfgtablekey)
return grub_errno;
/* Fill "configuration-table" key. */
for (i = 0; i < SYSTEM_TABLE (num_table_entries); i++)
{
void *ptr;
struct grub_xnu_devtree_key *curkey;
grub_efi_guid_t guid;
char guidbuf[64];
/* Retrieve current key. */
#ifdef GRUB_MACHINE_EFI
{
ptr = (void *)
grub_efi_system_table->configuration_table[i].vendor_table;
guid = grub_efi_system_table->configuration_table[i].vendor_guid;
}
#else
if (SIZEOF_OF_UINTN == 4)
{
ptr = UINT_TO_PTR (((grub_efiemu_configuration_table32_t *)
SYSTEM_TABLE_PTR (configuration_table))[i]
.vendor_table);
guid =
((grub_efiemu_configuration_table32_t *)
SYSTEM_TABLE_PTR (configuration_table))[i].vendor_guid;
}
else
{
ptr = UINT_TO_PTR (((grub_efiemu_configuration_table64_t *)
SYSTEM_TABLE_PTR (configuration_table))[i]
.vendor_table);
guid =
((grub_efiemu_configuration_table64_t *)
SYSTEM_TABLE_PTR (configuration_table))[i].vendor_guid;
}
#endif
/* The name of key for new table. */
grub_sprintf (guidbuf, "%08x-%04x-%04x-%02x%02x-",
guid.data1, guid.data2, guid.data3, guid.data4[0],
guid.data4[1]);
for (j = 2; j < 8; j++)
grub_sprintf (guidbuf + grub_strlen (guidbuf), "%02x", guid.data4[j]);
/* For some reason GUID has to be in uppercase. */
for (j = 0; guidbuf[j] ; j++)
if (guidbuf[j] >= 'a' && guidbuf[j] <= 'f')
guidbuf[j] += 'A' - 'a';
curkey = grub_xnu_create_key (&(cfgtablekey->first_child), guidbuf);
if (! curkey)
return grub_errno;
curval = grub_xnu_create_value (&(curkey->first_child), "guid");
if (! curval)
return grub_errno;
curval->datasize = sizeof (guid);
curval->data = grub_malloc (curval->datasize);
if (! curval->data)
return grub_errno;
grub_memcpy (curval->data, &guid, curval->datasize);
/* The value "table". */
curval = grub_xnu_create_value (&(curkey->first_child), "table");
if (! curval)
return grub_errno;
curval->datasize = SIZEOF_OF_UINTN;
curval->data = grub_malloc (curval->datasize);
if (! curval->data)
return grub_errno;
if (SIZEOF_OF_UINTN == 4)
*((grub_uint32_t *)curval->data) = PTR_TO_UINT32 (ptr);
else
*((grub_uint64_t *)curval->data) = PTR_TO_UINT64 (ptr);
/* Create alias. */
for (j = 0; j < sizeof (table_aliases) / sizeof (table_aliases[0]); j++)
if (grub_memcmp (&table_aliases[j].guid, &guid, sizeof (guid)) == 0)
break;
if (j != sizeof (table_aliases) / sizeof (table_aliases[0]))
{
curval = grub_xnu_create_value (&(curkey->first_child), "alias");
if (!curval)
return grub_errno;
curval->datasize = grub_strlen (table_aliases[j].name) + 1;
curval->data = grub_malloc (curval->datasize);
if (!curval->data)
return grub_errno;
grub_memcpy (curval->data, table_aliases[j].name, curval->datasize);
}
}
/* Create and fill "runtime-services" key. */
runtimesrvkey = grub_xnu_create_key (&(efikey->first_child),
"runtime-services");
if (! runtimesrvkey)
return grub_errno;
curval = grub_xnu_create_value (&(runtimesrvkey->first_child), "table");
if (! curval)
return grub_errno;
curval->datasize = SIZEOF_OF_UINTN;
curval->data = grub_malloc (curval->datasize);
if (! curval->data)
return grub_errno;
if (SIZEOF_OF_UINTN == 4)
*((grub_uint32_t *) curval->data)
= PTR_TO_UINT32 (SYSTEM_TABLE_PTR (runtime_services));
else
*((grub_uint64_t *) curval->data)
= PTR_TO_UINT64 (SYSTEM_TABLE_PTR (runtime_services));
return GRUB_ERR_NONE;
}
/* Boot xnu. */
grub_err_t
grub_xnu_boot (void)
{
struct grub_xnu_boot_params *bootparams_relloc;
grub_off_t bootparams_relloc_off;
grub_off_t mmap_relloc_off;
grub_err_t err;
grub_efi_uintn_t memory_map_size = 0;
grub_efi_memory_descriptor_t *memory_map;
grub_efi_uintn_t map_key = 0;
grub_efi_uintn_t descriptor_size = 0;
grub_efi_uint32_t descriptor_version = 0;
grub_uint64_t firstruntimeaddr, lastruntimeaddr;
void *devtree;
grub_size_t devtreelen;
int i;
/* Page-align to avoid following parts to be inadvertently freed. */
err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
if (err)
return err;
/* Pass memory map to kernel. */
memory_map_size = 0;
memory_map = 0;
map_key = 0;
descriptor_size = 0;
descriptor_version = 0;
if (grub_autoefi_get_memory_map (&memory_map_size, memory_map,
&map_key, &descriptor_size,
&descriptor_version) < 0)
return grub_errno;
memory_map = grub_xnu_heap_malloc (memory_map_size);
if (! memory_map)
return grub_errno;
if (grub_autoefi_get_memory_map (&memory_map_size, memory_map,
&map_key, &descriptor_size,
&descriptor_version) <= 0)
return grub_errno;
mmap_relloc_off = (grub_uint8_t *) memory_map
- (grub_uint8_t *) grub_xnu_heap_start;
firstruntimeaddr = (grub_uint64_t) (-1);
lastruntimeaddr = 0;
for (i = 0; (unsigned) i < memory_map_size / descriptor_size; i++)
{
grub_efi_memory_descriptor_t *curdesc = (grub_efi_memory_descriptor_t *)
((char *) memory_map + descriptor_size * i);
/* Some EFI implementations set physical_start to 0 which
causes XNU crash. */
curdesc->virtual_start = curdesc->physical_start;
if (curdesc->type == GRUB_EFI_RUNTIME_SERVICES_DATA
|| curdesc->type == GRUB_EFI_RUNTIME_SERVICES_CODE)
{
if (firstruntimeaddr > curdesc->physical_start)
firstruntimeaddr = curdesc->physical_start;
if (lastruntimeaddr < curdesc->physical_start
+ curdesc->num_pages * 4096)
lastruntimeaddr = curdesc->physical_start
+ curdesc->num_pages * 4096;
}
}
/* Relocate the boot parameters to heap. */
bootparams_relloc = grub_xnu_heap_malloc (sizeof (*bootparams_relloc));
if (! bootparams_relloc)
return grub_errno;
bootparams_relloc_off = (grub_uint8_t *) bootparams_relloc
- (grub_uint8_t *) grub_xnu_heap_start;
err = grub_xnu_writetree_toheap (&devtree, &devtreelen);
if (err)
return err;
bootparams_relloc = (struct grub_xnu_boot_params *)
(bootparams_relloc_off + (grub_uint8_t *) grub_xnu_heap_start);
grub_memcpy (bootparams_relloc->cmdline, grub_xnu_cmdline,
sizeof (bootparams_relloc->cmdline));
bootparams_relloc->devtree = ((char *) devtree - grub_xnu_heap_start)
+ grub_xnu_heap_will_be_at;
bootparams_relloc->devtreelen = devtreelen;
bootparams_relloc->heap_start = grub_xnu_heap_will_be_at;
bootparams_relloc->heap_size = grub_xnu_heap_size;
bootparams_relloc->efi_mmap = grub_xnu_heap_will_be_at + mmap_relloc_off;
bootparams_relloc->efi_mmap_size = memory_map_size;
bootparams_relloc->efi_mem_desc_size = descriptor_size;
bootparams_relloc->efi_mem_desc_version = descriptor_version;
bootparams_relloc->efi_runtime_first_page = firstruntimeaddr
/ GRUB_XNU_PAGESIZE;
bootparams_relloc->efi_runtime_npages
= ((lastruntimeaddr + GRUB_XNU_PAGESIZE - 1) / GRUB_XNU_PAGESIZE)
- (firstruntimeaddr / GRUB_XNU_PAGESIZE);
bootparams_relloc->efi_uintnbits = SIZEOF_OF_UINTN * 8;
bootparams_relloc->efi_system_table
= PTR_TO_UINT32 (grub_autoefi_system_table);
bootparams_relloc->verminor = GRUB_XNU_BOOTARGS_VERMINOR;
bootparams_relloc->vermajor = GRUB_XNU_BOOTARGS_VERMAJOR;
/* Parameters for asm helper. */
grub_xnu_stack = bootparams_relloc->heap_start
+ bootparams_relloc->heap_size + GRUB_XNU_PAGESIZE;
grub_xnu_arg1 = bootparams_relloc_off + grub_xnu_heap_will_be_at;
#ifndef GRUB_UTIL
grub_xnu_launch = (void (*) (void))
(grub_xnu_heap_start + grub_xnu_heap_size);
#endif
grub_dprintf ("xnu", "eip=%x\n", grub_xnu_entry_point);
grub_dprintf ("xnu", "launch=%p\n", grub_xnu_launch);
const char *debug = grub_env_get ("debug");
if (debug && (grub_strword (debug, "all") || grub_strword (debug, "xnu")))
{
grub_printf ("Press any key to launch xnu\n");
grub_getkey ();
}
/* Set video. */
err = grub_xnu_set_video (bootparams_relloc);
if (err != GRUB_ERR_NONE)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
grub_printf ("Booting in blind mode\n");
bootparams_relloc->lfb_mode = 0;
bootparams_relloc->lfb_width = 0;
bootparams_relloc->lfb_height = 0;
bootparams_relloc->lfb_depth = 0;
bootparams_relloc->lfb_line_len = 0;
bootparams_relloc->lfb_base = 0;
}
grub_memcpy (grub_xnu_heap_start + grub_xnu_heap_size,
grub_xnu_launcher_start,
grub_xnu_launcher_end - grub_xnu_launcher_start);
if (! grub_autoefi_finish_boot_services ())
return grub_error (GRUB_ERR_IO, "can't exit boot services");
grub_xnu_launch ();
/* Never reaches here. */
return 0;
}
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