d22e3b024e
(Wasting 4k just as a temporary placeholder for a boot environment seems a bit ridiculous, but hey.) Tested: gxemul: $ gxemul -e malta -d i:/home/adrian/work/freebsd/svn/mfsroot-rspro.img -C 4Kc /tftpboot/kernel.MALTA
310 lines
6.7 KiB
C
310 lines
6.7 KiB
C
/*-
|
|
* Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_ddb.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/imgact.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/cpu.h>
|
|
#include <sys/cons.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/ucontext.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kdb.h>
|
|
#include <sys/ptrace.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/user.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_page.h>
|
|
|
|
#include <machine/clock.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/cpuregs.h>
|
|
#include <machine/hwfunc.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/pmap.h>
|
|
#include <machine/trap.h>
|
|
|
|
#ifdef TICK_USE_YAMON_FREQ
|
|
#include <mips/malta/yamon.h>
|
|
#endif
|
|
|
|
#ifdef TICK_USE_MALTA_RTC
|
|
#include <mips/mips4k/malta/maltareg.h>
|
|
#include <dev/mc146818/mc146818reg.h>
|
|
#include <isa/rtc.h>
|
|
#endif
|
|
|
|
#include <mips/malta/maltareg.h>
|
|
|
|
extern int *edata;
|
|
extern int *end;
|
|
|
|
void lcd_init(void);
|
|
void lcd_puts(char *);
|
|
void malta_reset(void);
|
|
|
|
/*
|
|
* Temporary boot environment used at startup.
|
|
*/
|
|
static char boot1_env[4096];
|
|
|
|
/*
|
|
* Offsets to MALTA LCD characters.
|
|
*/
|
|
static int malta_lcd_offs[] = {
|
|
MALTA_ASCIIPOS0,
|
|
MALTA_ASCIIPOS1,
|
|
MALTA_ASCIIPOS2,
|
|
MALTA_ASCIIPOS3,
|
|
MALTA_ASCIIPOS4,
|
|
MALTA_ASCIIPOS5,
|
|
MALTA_ASCIIPOS6,
|
|
MALTA_ASCIIPOS7
|
|
};
|
|
|
|
void
|
|
platform_cpu_init()
|
|
{
|
|
/* Nothing special */
|
|
}
|
|
|
|
/*
|
|
* Put character to Malta LCD at given position.
|
|
*/
|
|
static void
|
|
malta_lcd_putc(int pos, char c)
|
|
{
|
|
void *addr;
|
|
char *ch;
|
|
|
|
if (pos < 0 || pos > 7)
|
|
return;
|
|
addr = (void *)(MALTA_ASCII_BASE + malta_lcd_offs[pos]);
|
|
ch = (char *)MIPS_PHYS_TO_KSEG0(addr);
|
|
*ch = c;
|
|
}
|
|
|
|
/*
|
|
* Print given string on LCD.
|
|
*/
|
|
static void
|
|
malta_lcd_print(char *str)
|
|
{
|
|
int i;
|
|
|
|
if (str == NULL)
|
|
return;
|
|
|
|
for (i = 0; *str != '\0'; i++, str++)
|
|
malta_lcd_putc(i, *str);
|
|
}
|
|
|
|
void
|
|
lcd_init(void)
|
|
{
|
|
malta_lcd_print("FreeBSD_");
|
|
}
|
|
|
|
void
|
|
lcd_puts(char *s)
|
|
{
|
|
malta_lcd_print(s);
|
|
}
|
|
|
|
#ifdef TICK_USE_MALTA_RTC
|
|
static __inline uint8_t
|
|
rtcin(uint8_t addr)
|
|
{
|
|
|
|
*((volatile uint8_t *)
|
|
MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCADR))) = addr;
|
|
return (*((volatile uint8_t *)
|
|
MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCDAT))));
|
|
}
|
|
|
|
static __inline void
|
|
writertc(uint8_t addr, uint8_t val)
|
|
{
|
|
|
|
*((volatile uint8_t *)
|
|
MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCADR))) = addr;
|
|
*((volatile uint8_t *)
|
|
MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCDAT))) = val;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
mips_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
phys_avail[i] = 0;
|
|
}
|
|
|
|
/* phys_avail regions are in bytes */
|
|
phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
|
|
phys_avail[1] = ctob(realmem);
|
|
|
|
dump_avail[0] = phys_avail[0];
|
|
dump_avail[1] = phys_avail[1];
|
|
|
|
physmem = realmem;
|
|
|
|
init_param1();
|
|
init_param2(physmem);
|
|
mips_cpu_init();
|
|
pmap_bootstrap();
|
|
mips_proc0_init();
|
|
mutex_init();
|
|
kdb_init();
|
|
#ifdef KDB
|
|
if (boothowto & RB_KDB)
|
|
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Perform a board-level soft-reset.
|
|
* Note that this is not emulated by gxemul.
|
|
*/
|
|
void
|
|
platform_reset(void)
|
|
{
|
|
char *c;
|
|
|
|
c = (char *)MIPS_PHYS_TO_KSEG0(MALTA_SOFTRES);
|
|
*c = MALTA_GORESET;
|
|
}
|
|
|
|
static uint64_t
|
|
malta_cpu_freq(void)
|
|
{
|
|
uint64_t platform_counter_freq = 0;
|
|
|
|
#if defined(TICK_USE_YAMON_FREQ)
|
|
/*
|
|
* If we are running on a board which uses YAMON firmware,
|
|
* then query CPU pipeline clock from the syscon object.
|
|
* If unsuccessful, use hard-coded default.
|
|
*/
|
|
platform_counter_freq = yamon_getcpufreq();
|
|
|
|
#elif defined(TICK_USE_MALTA_RTC)
|
|
/*
|
|
* If we are running on a board with the MC146818 RTC,
|
|
* use it to determine CPU pipeline clock frequency.
|
|
*/
|
|
u_int64_t counterval[2];
|
|
|
|
/* Set RTC to binary mode. */
|
|
writertc(RTC_STATUSB, (rtcin(RTC_STATUSB) | RTCSB_BCD));
|
|
|
|
/* Busy-wait for falling edge of RTC update. */
|
|
while (((rtcin(RTC_STATUSA) & RTCSA_TUP) == 0))
|
|
;
|
|
while (((rtcin(RTC_STATUSA)& RTCSA_TUP) != 0))
|
|
;
|
|
counterval[0] = mips_rd_count();
|
|
|
|
/* Busy-wait for falling edge of RTC update. */
|
|
while (((rtcin(RTC_STATUSA) & RTCSA_TUP) == 0))
|
|
;
|
|
while (((rtcin(RTC_STATUSA)& RTCSA_TUP) != 0))
|
|
;
|
|
counterval[1] = mips_rd_count();
|
|
|
|
platform_counter_freq = counterval[1] - counterval[0];
|
|
#endif
|
|
|
|
if (platform_counter_freq == 0)
|
|
platform_counter_freq = MIPS_DEFAULT_HZ;
|
|
|
|
return (platform_counter_freq);
|
|
}
|
|
|
|
void
|
|
platform_start(__register_t a0, __register_t a1, __register_t a2,
|
|
__register_t a3)
|
|
{
|
|
vm_offset_t kernend;
|
|
uint64_t platform_counter_freq;
|
|
int argc = a0;
|
|
char **argv = (char **)a1;
|
|
char **envp = (char **)a2;
|
|
unsigned int memsize = a3;
|
|
int i;
|
|
|
|
/* clear the BSS and SBSS segments */
|
|
kernend = (vm_offset_t)&end;
|
|
memset(&edata, 0, kernend - (vm_offset_t)(&edata));
|
|
|
|
mips_postboot_fixup();
|
|
|
|
mips_pcpu0_init();
|
|
platform_counter_freq = malta_cpu_freq();
|
|
mips_timer_early_init(platform_counter_freq);
|
|
init_static_kenv(boot1_env, sizeof(boot1_env));
|
|
|
|
cninit();
|
|
printf("entry: platform_start()\n");
|
|
|
|
bootverbose = 1;
|
|
if (bootverbose) {
|
|
printf("cmd line: ");
|
|
for (i = 0; i < argc; i++)
|
|
printf("%s ", argv[i]);
|
|
printf("\n");
|
|
|
|
printf("envp:\n");
|
|
for (i = 0; envp[i]; i += 2)
|
|
printf("\t%s = %s\n", envp[i], envp[i+1]);
|
|
|
|
printf("memsize = %08x\n", memsize);
|
|
}
|
|
|
|
realmem = btoc(memsize);
|
|
mips_init();
|
|
|
|
mips_timer_init_params(platform_counter_freq, 0);
|
|
}
|