288 lines
7.2 KiB
C
288 lines
7.2 KiB
C
/*-
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* Copyright (c) 2009 Oleksandr Tymoshenko
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include "opt_ar71xx.h"
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/cons.h>
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#include <sys/kdb.h>
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#include <sys/reboot.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <net/ethernet.h>
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#include <machine/clock.h>
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#include <machine/cpu.h>
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#include <machine/cpuregs.h>
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#include <machine/hwfunc.h>
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#include <machine/md_var.h>
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#include <machine/trap.h>
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#include <machine/vmparam.h>
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#include <mips/atheros/ar71xxreg.h>
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#include <mips/atheros/ar71xx_setup.h>
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#include <mips/atheros/ar71xx_cpudef.h>
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#include <mips/sentry5/s5reg.h>
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extern char edata[], end[];
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uint32_t ar711_base_mac[ETHER_ADDR_LEN];
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/* 4KB static data aread to keep a copy of the bootload env until
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the dynamic kenv is setup */
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char boot1_env[4096];
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/*
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* We get a string in from Redboot with the all the arguments together,
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* "foo=bar bar=baz". Split them up and save in kenv.
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*/
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static void
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parse_argv(char *str)
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{
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char *n, *v;
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while ((v = strsep(&str, " ")) != NULL) {
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if (*v == '\0')
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continue;
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if (*v == '-') {
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while (*v != '\0') {
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v++;
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switch (*v) {
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case 'a': boothowto |= RB_ASKNAME; break;
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case 'd': boothowto |= RB_KDB; break;
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case 'g': boothowto |= RB_GDB; break;
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case 's': boothowto |= RB_SINGLE; break;
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case 'v': boothowto |= RB_VERBOSE; break;
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}
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}
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} else {
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n = strsep(&v, "=");
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if (v == NULL)
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setenv(n, "1");
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else
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setenv(n, v);
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}
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}
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}
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void
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platform_cpu_init()
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{
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/* Nothing special */
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}
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void
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platform_reset(void)
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{
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ar71xx_device_stop(RST_RESET_FULL_CHIP);
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/* Wait for reset */
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while(1)
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;
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}
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/*
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* Obtain the MAC address via the Redboot environment.
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*/
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static void
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ar71xx_redboot_get_macaddr(void)
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{
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char *var;
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int count = 0;
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/*
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* "ethaddr" is passed via envp on RedBoot platforms
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* "kmac" is passed via argv on RouterBOOT platforms
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*/
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if ((var = getenv("ethaddr")) != NULL ||
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(var = getenv("kmac")) != NULL) {
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count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
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&ar711_base_mac[0], &ar711_base_mac[1],
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&ar711_base_mac[2], &ar711_base_mac[3],
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&ar711_base_mac[4], &ar711_base_mac[5]);
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if (count < 6)
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memset(ar711_base_mac, 0,
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sizeof(ar711_base_mac));
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freeenv(var);
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}
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}
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void
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platform_start(__register_t a0 __unused, __register_t a1 __unused,
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__register_t a2 __unused, __register_t a3 __unused)
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{
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uint64_t platform_counter_freq;
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int argc = 0, i;
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char **argv = NULL, **envp = NULL;
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vm_offset_t kernend;
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/*
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* clear the BSS and SBSS segments, this should be first call in
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* the function
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*/
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kernend = (vm_offset_t)&end;
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memset(&edata, 0, kernend - (vm_offset_t)(&edata));
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mips_postboot_fixup();
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/* Initialize pcpu stuff */
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mips_pcpu0_init();
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/*
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* Until some more sensible abstractions for uboot/redboot
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* environment handling, we have to make this a compile-time
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* hack. The existing code handles the uboot environment
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* very incorrectly so we should just ignore initialising
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* the relevant pointers.
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*/
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#ifndef AR71XX_ENV_UBOOT
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argc = a0;
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argv = (char**)a1;
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envp = (char**)a2;
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#endif
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/*
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* Protect ourselves from garbage in registers
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*/
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if (MIPS_IS_VALID_PTR(envp)) {
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for (i = 0; envp[i]; i += 2) {
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if (strcmp(envp[i], "memsize") == 0)
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realmem = btoc(strtoul(envp[i+1], NULL, 16));
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}
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}
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/*
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* Just wild guess. RedBoot let us down and didn't reported
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* memory size
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*/
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if (realmem == 0)
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realmem = btoc(32*1024*1024);
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/*
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* Allow build-time override in case Redboot lies
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* or in other situations (eg where there's u-boot)
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* where there isn't (yet) a convienent method of
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* being told how much RAM is available.
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*
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* This happens on at least the Ubiquiti LS-SR71A
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* board, where redboot says there's 16mb of RAM
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* but in fact there's 32mb.
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*/
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#if defined(AR71XX_REALMEM)
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realmem = btoc(AR71XX_REALMEM);
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#endif
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/* phys_avail regions are in bytes */
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phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
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phys_avail[1] = ctob(realmem);
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dump_avail[0] = phys_avail[0];
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dump_avail[1] = phys_avail[1] - phys_avail[0];
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physmem = realmem;
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/*
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* ns8250 uart code uses DELAY so ticker should be inititalized
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* before cninit. And tick_init_params refers to hz, so * init_param1
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* should be called first.
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*/
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init_param1();
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/* Detect the system type - this is needed for subsequent chipset-specific calls */
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ar71xx_detect_sys_type();
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ar71xx_detect_sys_frequency();
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platform_counter_freq = ar71xx_cpu_freq();
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mips_timer_init_params(platform_counter_freq, 1);
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cninit();
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init_static_kenv(boot1_env, sizeof(boot1_env));
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printf("CPU platform: %s\n", ar71xx_get_system_type());
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printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
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printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
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printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
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printf("platform frequency: %lld\n", platform_counter_freq);
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printf("CPU reference clock: %d MHz\n", u_ar71xx_refclk / 1000000);
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printf("arguments: \n");
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printf(" a0 = %08x\n", a0);
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printf(" a1 = %08x\n", a1);
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printf(" a2 = %08x\n", a2);
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printf(" a3 = %08x\n", a3);
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/*
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* XXX this code is very redboot specific.
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*/
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printf("Cmd line:");
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if (MIPS_IS_VALID_PTR(argv)) {
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for (i = 0; i < argc; i++) {
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printf(" %s", argv[i]);
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parse_argv(argv[i]);
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}
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}
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else
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printf ("argv is invalid");
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printf("\n");
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printf("Environment:\n");
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if (MIPS_IS_VALID_PTR(envp)) {
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for (i = 0; envp[i]; i+=2) {
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printf(" %s = %s\n", envp[i], envp[i+1]);
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setenv(envp[i], envp[i+1]);
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}
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}
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else
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printf ("envp is invalid\n");
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/* Redboot if_arge MAC address is in the environment */
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ar71xx_redboot_get_macaddr();
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init_param2(physmem);
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mips_cpu_init();
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pmap_bootstrap();
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mips_proc0_init();
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mutex_init();
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/*
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* Reset USB devices
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*/
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ar71xx_init_usb_peripheral();
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kdb_init();
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
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#endif
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}
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