- 根目录:
- arch
- ia64
- hp
- sim
- boot
- fw-emu.c
/*
* PAL & SAL emulation.
*
* Copyright (C) 1998-2001 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#ifdef CONFIG_PCI
# include <linux/pci.h>
#endif
#include <linux/efi.h>
#include <asm/io.h>
#include <asm/pal.h>
#include <asm/sal.h>
#include "ssc.h"
#define MB (1024*1024UL)
#define SIMPLE_MEMMAP 1
#if SIMPLE_MEMMAP
# define NUM_MEM_DESCS 4
#else
# define NUM_MEM_DESCS 16
#endif
static char fw_mem[( sizeof(struct ia64_boot_param)
+ sizeof(efi_system_table_t)
+ sizeof(efi_runtime_services_t)
+ 1*sizeof(efi_config_table_t)
+ sizeof(struct ia64_sal_systab)
+ sizeof(struct ia64_sal_desc_entry_point)
+ NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
+ 1024)] __attribute__ ((aligned (8)));
#define SECS_PER_HOUR (60 * 60)
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
/* Compute the `struct tm' representation of *T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
Return nonzero if successful. */
int
offtime (unsigned long t, efi_time_t *tp)
{
const unsigned short int __mon_yday[2][13] =
{
/* Normal years. */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years. */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
long int days, rem, y;
const unsigned short int *ip;
days = t / SECS_PER_DAY;
rem = t % SECS_PER_DAY;
while (rem < 0) {
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY) {
rem -= SECS_PER_DAY;
++days;
}
tp->hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
tp->minute = rem / 60;
tp->second = rem % 60;
/* January 1, 1970 was a Thursday. */
y = 1970;
# define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
# define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
# define __isleap(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
/* Guess a corrected year, assuming 365 days per year. */
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
tp->year = y;
ip = __mon_yday[__isleap(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
tp->month = y + 1;
tp->day = days + 1;
return 1;
}
extern void pal_emulator_static (void);
/* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
#define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3)
#define REG_OFFSET(addr) (0x00000000000000FF & (addr))
#define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr))
#define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr))
static efi_status_t
fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
{
#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
struct {
int tv_sec; /* must be 32bits to work */
int tv_usec;
} tv32bits;
ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
memset(tm, 0, sizeof(*tm));
offtime(tv32bits.tv_sec, tm);
if (tc)
memset(tc, 0, sizeof(*tc));
#else
# error Not implemented yet...
#endif
return EFI_SUCCESS;
}
static void
efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
{
#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
ssc(status, 0, 0, 0, SSC_EXIT);
#else
# error Not implemented yet...
#endif
}
static efi_status_t
efi_unimplemented (void)
{
return EFI_UNSUPPORTED;
}
static struct sal_ret_values
sal_emulator (long index, unsigned long in1, unsigned long in2,
unsigned long in3, unsigned long in4, unsigned long in5,
unsigned long in6, unsigned long in7)
{
long r9 = 0;
long r10 = 0;
long r11 = 0;
long status;
/*
* Don't do a "switch" here since that gives us code that
* isn't self-relocatable.
*/
status = 0;
if (index == SAL_FREQ_BASE) {
switch (in1) {
case SAL_FREQ_BASE_PLATFORM:
r9 = 200000000;
break;
case SAL_FREQ_BASE_INTERVAL_TIMER:
/*
* Is this supposed to be the cr.itc frequency
* or something platform specific? The SAL
* doc ain't exactly clear on this...
*/
r9 = 700000000;
break;
case SAL_FREQ_BASE_REALTIME_CLOCK:
r9 = 1;
break;
default:
status = -1;
break;
}
} else if (index == SAL_SET_VECTORS) {
;
} else if (index == SAL_GET_STATE_INFO) {
;
} else if (index == SAL_GET_STATE_INFO_SIZE) {
;
} else if (index == SAL_CLEAR_STATE_INFO) {
;
} else if (index == SAL_MC_RENDEZ) {
;
} else if (index == SAL_MC_SET_PARAMS) {
;
} else if (index == SAL_CACHE_FLUSH) {
;
} else if (index == SAL_CACHE_INIT) {
;
#ifdef CONFIG_PCI
} else if (index == SAL_PCI_CONFIG_READ) {
/*
* in1 contains the PCI configuration address and in2
* the size of the read. The value that is read is
* returned via the general register r9.
*/
outl(BUILD_CMD(in1), 0xCF8);
if (in2 == 1) /* Reading byte */
r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
else if (in2 == 2) /* Reading word */
r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
else /* Reading dword */
r9 = inl(0xCFC);
status = PCIBIOS_SUCCESSFUL;
} else if (index == SAL_PCI_CONFIG_WRITE) {
/*
* in1 contains the PCI configuration address, in2 the
* size of the write, and in3 the actual value to be
* written out.
*/
outl(BUILD_CMD(in1), 0xCF8);
if (in2 == 1) /* Writing byte */
outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
else if (in2 == 2) /* Writing word */
outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
else /* Writing dword */
outl(in3, 0xCFC);
status = PCIBIOS_SUCCESSFUL;
#endif /* CONFIG_PCI */
} else if (index == SAL_UPDATE_PAL) {
;
} else {
status = -1;
}
return ((struct sal_ret_values) {status, r9, r10, r11});
}
struct ia64_boot_param *
sys_fw_init (const char *args, int arglen)
{
efi_system_table_t *efi_systab;
efi_runtime_services_t *efi_runtime;
efi_config_table_t *efi_tables;
struct ia64_sal_systab *sal_systab;
efi_memory_desc_t *efi_memmap, *md;
unsigned long *pal_desc, *sal_desc;
struct ia64_sal_desc_entry_point *sal_ed;
struct ia64_boot_param *bp;
unsigned char checksum = 0;
char *cp, *cmd_line;
int i = 0;
# define MAKE_MD(typ, attr, start, end) \
do { \
md = efi_memmap + i++; \
md->type = typ; \
md->pad = 0; \
md->phys_addr = start; \
md->virt_addr = 0; \
md->num_pages = (end - start) >> 12; \
md->attribute = attr; \
} while (0)
memset(fw_mem, 0, sizeof(fw_mem));
pal_desc = (unsigned long *) &pal_emulator_static;
sal_desc = (unsigned long *) &sal_emulator;
cp = fw_mem;
efi_systab = (void *) cp; cp += sizeof(*efi_systab);
efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
efi_tables = (void *) cp; cp += sizeof(*efi_tables);
sal_systab = (void *) cp; cp += sizeof(*sal_systab);
sal_ed = (void *) cp; cp += sizeof(*sal_ed);
efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
bp = (void *) cp; cp += sizeof(*bp);
cmd_line = (void *) cp;
if (args) {
if (arglen >= 1024)
arglen = 1023;
memcpy(cmd_line, args, arglen);
} else {
arglen = 0;
}
cmd_line[arglen] = '\0';
memset(efi_systab, 0, sizeof(*efi_systab));
efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
efi_systab->hdr.revision = ((1 << 16) | 00);
efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
efi_systab->fw_revision = 1;
efi_systab->runtime = (void *) __pa(efi_runtime);
efi_systab->nr_tables = 1;
efi_systab->tables = __pa(efi_tables);
efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
efi_runtime->get_time = __pa(&fw_efi_get_time);
efi_runtime->set_time = __pa(&efi_unimplemented);
efi_runtime->get_wakeup_time = __pa(&efi_unimplemented);
efi_runtime->set_wakeup_time = __pa(&efi_unimplemented);
efi_runtime->set_virtual_address_map = __pa(&efi_unimplemented);
efi_runtime->get_variable = __pa(&efi_unimplemented);
efi_runtime->get_next_variable = __pa(&efi_unimplemented);
efi_runtime->set_variable = __pa(&efi_unimplemented);
efi_runtime->get_next_high_mono_count = __pa(&efi_unimplemented);
efi_runtime->reset_system = __pa(&efi_reset_system);
efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
efi_tables->table = __pa(sal_systab);
/* fill in the SAL system table: */
memcpy(sal_systab->signature, "SST_", 4);
sal_systab->size = sizeof(*sal_systab);
sal_systab->sal_rev_minor = 1;
sal_systab->sal_rev_major = 0;
sal_systab->entry_count = 1;
#ifdef CONFIG_IA64_GENERIC
strcpy(sal_systab->oem_id, "Generic");
strcpy(sal_systab->product_id, "IA-64 system");
#endif
#ifdef CONFIG_IA64_HP_SIM
strcpy(sal_systab->oem_id, "Hewlett-Packard");
strcpy(sal_systab->product_id, "HP-simulator");
#endif
/* fill in an entry point: */
sal_ed->type = SAL_DESC_ENTRY_POINT;
sal_ed->pal_proc = __pa(pal_desc[0]);
sal_ed->sal_proc = __pa(sal_desc[0]);
sal_ed->gp = __pa(sal_desc[1]);
for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
checksum += *cp;
sal_systab->checksum = -checksum;
#if SIMPLE_MEMMAP
/* simulate free memory at physical address zero */
MAKE_MD(EFI_BOOT_SERVICES_DATA, EFI_MEMORY_WB, 0*MB, 1*MB);
MAKE_MD(EFI_PAL_CODE, EFI_MEMORY_WB, 1*MB, 2*MB);
MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 2*MB, 130*MB);
MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 4096*MB, 4128*MB);
#else
MAKE_MD( 4, 0x9, 0x0000000000000000, 0x0000000000001000);
MAKE_MD( 7, 0x9, 0x0000000000001000, 0x000000000008a000);
MAKE_MD( 4, 0x9, 0x000000000008a000, 0x00000000000a0000);
MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
MAKE_MD( 7, 0x9, 0x0000000000100000, 0x0000000004400000);
MAKE_MD( 2, 0x9, 0x0000000004400000, 0x0000000004be5000);
MAKE_MD( 7, 0x9, 0x0000000004be5000, 0x000000007f77e000);
MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
MAKE_MD( 7, 0x9, 0x000000007fc3a000, 0x000000007fea0000);
MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
MAKE_MD( 7, 0x9, 0x000000007fea8000, 0x000000007feab000);
MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
MAKE_MD( 7, 0x9, 0x00000000ff400000, 0x0000000104000000);
#endif
bp->efi_systab = __pa(&fw_mem);
bp->efi_memmap = __pa(efi_memmap);
bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
bp->efi_memdesc_version = 1;
bp->command_line = __pa(cmd_line);
bp->console_info.num_cols = 80;
bp->console_info.num_rows = 25;
bp->console_info.orig_x = 0;
bp->console_info.orig_y = 24;
bp->fpswa = 0;
return bp;
}