312af517e3
implementations or no implementation on all platforms. Some of these functions might be good ideas, but their semantics were unclear given the lack of implementation, and an unlucky porter could be fooled into trying to implement them or, worse, being baffled when something like platform_trap_enter() failed to be called.
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("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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