375 lines
11 KiB
C
Executable file
375 lines
11 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* PAL & SAL emulation.
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*
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* Copyright (C) 1998-2001 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#ifdef CONFIG_PCI
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# include <linux/pci.h>
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#endif
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#include <linux/efi.h>
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#include <asm/io.h>
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#include <asm/pal.h>
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#include <asm/sal.h>
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#include <asm/setup.h>
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#include "ssc.h"
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#define MB (1024*1024UL)
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#define SIMPLE_MEMMAP 1
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#if SIMPLE_MEMMAP
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# define NUM_MEM_DESCS 4
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#else
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# define NUM_MEM_DESCS 16
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#endif
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static char fw_mem[( sizeof(struct ia64_boot_param)
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+ sizeof(efi_system_table_t)
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+ sizeof(efi_runtime_services_t)
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+ 1*sizeof(efi_config_table_t)
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+ sizeof(struct ia64_sal_systab)
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+ sizeof(struct ia64_sal_desc_entry_point)
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+ NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
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+ 1024)] __attribute__ ((aligned (8)));
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#define SECS_PER_HOUR (60 * 60)
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#define SECS_PER_DAY (SECS_PER_HOUR * 24)
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/* Compute the `struct tm' representation of *T,
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offset OFFSET seconds east of UTC,
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and store year, yday, mon, mday, wday, hour, min, sec into *TP.
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Return nonzero if successful. */
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int
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offtime (unsigned long t, efi_time_t *tp)
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{
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const unsigned short int __mon_yday[2][13] =
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{
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/* Normal years. */
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{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
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/* Leap years. */
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{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
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};
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long int days, rem, y;
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const unsigned short int *ip;
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days = t / SECS_PER_DAY;
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rem = t % SECS_PER_DAY;
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while (rem < 0) {
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rem += SECS_PER_DAY;
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--days;
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}
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while (rem >= SECS_PER_DAY) {
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rem -= SECS_PER_DAY;
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++days;
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}
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tp->hour = rem / SECS_PER_HOUR;
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rem %= SECS_PER_HOUR;
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tp->minute = rem / 60;
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tp->second = rem % 60;
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/* January 1, 1970 was a Thursday. */
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y = 1970;
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# define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
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# define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
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# define __isleap(year) \
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((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
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while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
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/* Guess a corrected year, assuming 365 days per year. */
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long int yg = y + days / 365 - (days % 365 < 0);
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/* Adjust DAYS and Y to match the guessed year. */
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days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
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- LEAPS_THRU_END_OF (y - 1));
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y = yg;
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}
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tp->year = y;
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ip = __mon_yday[__isleap(y)];
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for (y = 11; days < (long int) ip[y]; --y)
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continue;
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days -= ip[y];
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tp->month = y + 1;
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tp->day = days + 1;
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return 1;
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}
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extern void pal_emulator_static (void);
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/* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
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#define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3)
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#define REG_OFFSET(addr) (0x00000000000000FF & (addr))
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#define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr))
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#define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr))
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static efi_status_t
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fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
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{
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#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
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struct {
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int tv_sec; /* must be 32bits to work */
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int tv_usec;
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} tv32bits;
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ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
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memset(tm, 0, sizeof(*tm));
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offtime(tv32bits.tv_sec, tm);
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if (tc)
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memset(tc, 0, sizeof(*tc));
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#else
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# error Not implemented yet...
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#endif
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return EFI_SUCCESS;
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}
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static void
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efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
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{
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#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
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ssc(status, 0, 0, 0, SSC_EXIT);
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#else
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# error Not implemented yet...
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#endif
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}
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static efi_status_t
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efi_unimplemented (void)
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{
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return EFI_UNSUPPORTED;
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}
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static struct sal_ret_values
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sal_emulator (long index, unsigned long in1, unsigned long in2,
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unsigned long in3, unsigned long in4, unsigned long in5,
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unsigned long in6, unsigned long in7)
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{
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long r9 = 0;
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long r10 = 0;
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long r11 = 0;
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long status;
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/*
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* Don't do a "switch" here since that gives us code that
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* isn't self-relocatable.
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*/
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status = 0;
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if (index == SAL_FREQ_BASE) {
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if (in1 == SAL_FREQ_BASE_PLATFORM)
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r9 = 200000000;
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else if (in1 == SAL_FREQ_BASE_INTERVAL_TIMER) {
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/*
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* Is this supposed to be the cr.itc frequency
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* or something platform specific? The SAL
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* doc ain't exactly clear on this...
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*/
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r9 = 700000000;
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} else if (in1 == SAL_FREQ_BASE_REALTIME_CLOCK)
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r9 = 1;
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else
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status = -1;
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} else if (index == SAL_SET_VECTORS) {
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;
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} else if (index == SAL_GET_STATE_INFO) {
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;
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} else if (index == SAL_GET_STATE_INFO_SIZE) {
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;
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} else if (index == SAL_CLEAR_STATE_INFO) {
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;
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} else if (index == SAL_MC_RENDEZ) {
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;
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} else if (index == SAL_MC_SET_PARAMS) {
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;
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} else if (index == SAL_CACHE_FLUSH) {
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;
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} else if (index == SAL_CACHE_INIT) {
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;
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#ifdef CONFIG_PCI
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} else if (index == SAL_PCI_CONFIG_READ) {
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/*
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* in1 contains the PCI configuration address and in2
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* the size of the read. The value that is read is
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* returned via the general register r9.
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*/
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outl(BUILD_CMD(in1), 0xCF8);
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if (in2 == 1) /* Reading byte */
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r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
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else if (in2 == 2) /* Reading word */
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r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
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else /* Reading dword */
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r9 = inl(0xCFC);
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status = PCIBIOS_SUCCESSFUL;
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} else if (index == SAL_PCI_CONFIG_WRITE) {
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/*
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* in1 contains the PCI configuration address, in2 the
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* size of the write, and in3 the actual value to be
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* written out.
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*/
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outl(BUILD_CMD(in1), 0xCF8);
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if (in2 == 1) /* Writing byte */
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outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
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else if (in2 == 2) /* Writing word */
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outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
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else /* Writing dword */
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outl(in3, 0xCFC);
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status = PCIBIOS_SUCCESSFUL;
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#endif /* CONFIG_PCI */
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} else if (index == SAL_UPDATE_PAL) {
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;
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} else {
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status = -1;
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}
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return ((struct sal_ret_values) {status, r9, r10, r11});
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}
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struct ia64_boot_param *
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sys_fw_init (const char *args, int arglen)
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{
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efi_system_table_t *efi_systab;
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efi_runtime_services_t *efi_runtime;
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efi_config_table_t *efi_tables;
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struct ia64_sal_systab *sal_systab;
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efi_memory_desc_t *efi_memmap, *md;
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unsigned long *pal_desc, *sal_desc;
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struct ia64_sal_desc_entry_point *sal_ed;
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struct ia64_boot_param *bp;
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unsigned char checksum = 0;
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char *cp, *cmd_line;
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int i = 0;
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# define MAKE_MD(typ, attr, start, end) \
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do { \
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md = efi_memmap + i++; \
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md->type = typ; \
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md->pad = 0; \
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md->phys_addr = start; \
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md->virt_addr = 0; \
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md->num_pages = (end - start) >> 12; \
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md->attribute = attr; \
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} while (0)
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memset(fw_mem, 0, sizeof(fw_mem));
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pal_desc = (unsigned long *) &pal_emulator_static;
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sal_desc = (unsigned long *) &sal_emulator;
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cp = fw_mem;
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efi_systab = (void *) cp; cp += sizeof(*efi_systab);
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efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
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efi_tables = (void *) cp; cp += sizeof(*efi_tables);
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sal_systab = (void *) cp; cp += sizeof(*sal_systab);
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sal_ed = (void *) cp; cp += sizeof(*sal_ed);
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efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
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bp = (void *) cp; cp += sizeof(*bp);
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cmd_line = (void *) cp;
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if (args) {
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if (arglen >= 1024)
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arglen = 1023;
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memcpy(cmd_line, args, arglen);
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} else {
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arglen = 0;
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}
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cmd_line[arglen] = '\0';
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memset(efi_systab, 0, sizeof(*efi_systab));
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efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
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efi_systab->hdr.revision = ((1 << 16) | 00);
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efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
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efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
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efi_systab->fw_revision = 1;
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efi_systab->runtime = (void *) __pa(efi_runtime);
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efi_systab->nr_tables = 1;
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efi_systab->tables = __pa(efi_tables);
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efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
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efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
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efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
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efi_runtime->get_time = (void *)__pa(&fw_efi_get_time);
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efi_runtime->set_time = (void *)__pa(&efi_unimplemented);
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efi_runtime->get_wakeup_time = (void *)__pa(&efi_unimplemented);
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efi_runtime->set_wakeup_time = (void *)__pa(&efi_unimplemented);
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efi_runtime->set_virtual_address_map = (void *)__pa(&efi_unimplemented);
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efi_runtime->get_variable = (void *)__pa(&efi_unimplemented);
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efi_runtime->get_next_variable = (void *)__pa(&efi_unimplemented);
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efi_runtime->set_variable = (void *)__pa(&efi_unimplemented);
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efi_runtime->get_next_high_mono_count = (void *)__pa(&efi_unimplemented);
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efi_runtime->reset_system = (void *)__pa(&efi_reset_system);
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efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
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efi_tables->table = __pa(sal_systab);
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/* fill in the SAL system table: */
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memcpy(sal_systab->signature, "SST_", 4);
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sal_systab->size = sizeof(*sal_systab);
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sal_systab->sal_rev_minor = 1;
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sal_systab->sal_rev_major = 0;
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sal_systab->entry_count = 1;
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#ifdef CONFIG_IA64_GENERIC
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strcpy(sal_systab->oem_id, "Generic");
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strcpy(sal_systab->product_id, "IA-64 system");
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#endif
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#ifdef CONFIG_IA64_HP_SIM
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strcpy(sal_systab->oem_id, "Hewlett-Packard");
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strcpy(sal_systab->product_id, "HP-simulator");
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#endif
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/* fill in an entry point: */
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sal_ed->type = SAL_DESC_ENTRY_POINT;
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sal_ed->pal_proc = __pa(pal_desc[0]);
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sal_ed->sal_proc = __pa(sal_desc[0]);
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sal_ed->gp = __pa(sal_desc[1]);
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for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
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checksum += *cp;
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sal_systab->checksum = -checksum;
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#if SIMPLE_MEMMAP
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/* simulate free memory at physical address zero */
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MAKE_MD(EFI_BOOT_SERVICES_DATA, EFI_MEMORY_WB, 0*MB, 1*MB);
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MAKE_MD(EFI_PAL_CODE, EFI_MEMORY_WB, 1*MB, 2*MB);
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MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 2*MB, 130*MB);
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MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 4096*MB, 4128*MB);
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#else
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MAKE_MD( 4, 0x9, 0x0000000000000000, 0x0000000000001000);
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MAKE_MD( 7, 0x9, 0x0000000000001000, 0x000000000008a000);
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MAKE_MD( 4, 0x9, 0x000000000008a000, 0x00000000000a0000);
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MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
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MAKE_MD( 7, 0x9, 0x0000000000100000, 0x0000000004400000);
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MAKE_MD( 2, 0x9, 0x0000000004400000, 0x0000000004be5000);
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MAKE_MD( 7, 0x9, 0x0000000004be5000, 0x000000007f77e000);
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MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
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MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
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MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
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MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
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MAKE_MD( 7, 0x9, 0x000000007fc3a000, 0x000000007fea0000);
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MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
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MAKE_MD( 7, 0x9, 0x000000007fea8000, 0x000000007feab000);
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MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
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MAKE_MD( 7, 0x9, 0x00000000ff400000, 0x0000000104000000);
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#endif
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bp->efi_systab = __pa(&fw_mem);
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bp->efi_memmap = __pa(efi_memmap);
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bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
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bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
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bp->efi_memdesc_version = 1;
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bp->command_line = __pa(cmd_line);
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bp->console_info.num_cols = 80;
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bp->console_info.num_rows = 25;
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bp->console_info.orig_x = 0;
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bp->console_info.orig_y = 24;
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bp->fpswa = 0;
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return bp;
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}
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