void
platform_start(__register_t a0 __unused, __register_t a1 __unused,
__register_t a2 __unused, __register_t a3 __unused)
{
uint64_t platform_counter_freq;
int argc = 0, i;
char **argv = NULL, **envp = NULL;
vm_offset_t kernend;
/*
* clear the BSS and SBSS segments, this should be first call in
* the function
*/
kernend = (vm_offset_t)&end;
memset(&edata, 0, kernend - (vm_offset_t)(&edata));
mips_postboot_fixup();
/* Initialize pcpu stuff */
mips_pcpu0_init();
/*
* Until some more sensible abstractions for uboot/redboot
* environment handling, we have to make this a compile-time
* hack. The existing code handles the uboot environment
* very incorrectly so we should just ignore initialising
* the relevant pointers.
*/
#ifndef AR71XX_ENV_UBOOT
argc = a0;
argv = (char**)a1;
envp = (char**)a2;
#endif
/*
* Protect ourselves from garbage in registers
*/
if (MIPS_IS_VALID_PTR(envp)) {
for (i = 0; envp[i]; i += 2) {
if (strcmp(envp[i], "memsize") == 0)
realmem = btoc(strtoul(envp[i+1], NULL, 16));
}
}
/*
* Just wild guess. RedBoot let us down and didn't reported
* memory size
*/
if (realmem == 0)
realmem = btoc(32*1024*1024);
/*
* Allow build-time override in case Redboot lies
* or in other situations (eg where there's u-boot)
* where there isn't (yet) a convienent method of
* being told how much RAM is available.
*
* This happens on at least the Ubiquiti LS-SR71A
* board, where redboot says there's 16mb of RAM
* but in fact there's 32mb.
*/
#if defined(AR71XX_REALMEM)
realmem = btoc(AR71XX_REALMEM);
#endif
/* 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] - phys_avail[0];
physmem = realmem;
/*
* ns8250 uart code uses DELAY so ticker should be inititalized
* before cninit. And tick_init_params refers to hz, so * init_param1
* should be called first.
*/
init_param1();
/* Detect the system type - this is needed for subsequent chipset-specific calls */
ar71xx_detect_sys_type();
ar71xx_detect_sys_frequency();
platform_counter_freq = ar71xx_cpu_freq();
mips_timer_init_params(platform_counter_freq, 1);
cninit();
init_static_kenv(boot1_env, sizeof(boot1_env));
printf("CPU platform: %s\n", ar71xx_get_system_type());
printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
printf("platform frequency: %lld\n", platform_counter_freq);
printf("CPU reference clock: %d MHz\n", u_ar71xx_refclk / 1000000);
printf("arguments: \n");
printf(" a0 = %08x\n", a0);
printf(" a1 = %08x\n", a1);
printf(" a2 = %08x\n", a2);
printf(" a3 = %08x\n", a3);
/*
* XXX this code is very redboot specific.
*/
printf("Cmd line:");
if (MIPS_IS_VALID_PTR(argv)) {
for (i = 0; i < argc; i++) {
printf(" %s", argv[i]);
parse_argv(argv[i]);
}
}
else
printf ("argv is invalid");
printf("\n");
printf("Environment:\n");
if (MIPS_IS_VALID_PTR(envp)) {
for (i = 0; envp[i]; i+=2) {
printf(" %s = %s\n", envp[i], envp[i+1]);
setenv(envp[i], envp[i+1]);
}
}
else
printf ("envp is invalid\n");
/* Redboot if_arge MAC address is in the environment */
ar71xx_redboot_get_macaddr();
init_param2(physmem);
mips_cpu_init();
pmap_bootstrap();
mips_proc0_init();
mutex_init();
/*
* Reset USB devices
*/
ar71xx_init_usb_peripheral();
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
void
platform_start(__register_t a0 __unused, __register_t a1 __unused,
__register_t a2 __unused, __register_t a3 __unused)
{
uint64_t platform_counter_freq;
uint32_t reg;
int argc, i, count = 0;
char **argv, **envp;
vm_offset_t kernend;
/*
* clear the BSS and SBSS segments, this should be first call in
* the function
*/
kernend = (vm_offset_t)&end;
memset(&edata, 0, kernend - (vm_offset_t)(&edata));
mips_postboot_fixup();
/* Initialize pcpu stuff */
mips_pcpu0_init();
argc = a0;
argv = (char**)a1;
envp = (char**)a2;
/*
* Protect ourselves from garbage in registers
*/
if (MIPS_IS_VALID_PTR(envp)) {
for (i = 0; envp[i]; i += 2)
{
if (strcmp(envp[i], "memsize") == 0)
realmem = btoc(strtoul(envp[i+1], NULL, 16));
else if (strcmp(envp[i], "ethaddr") == 0) {
count = sscanf(envp[i+1], "%x.%x.%x.%x.%x.%x",
&ar711_base_mac[0], &ar711_base_mac[1],
&ar711_base_mac[2], &ar711_base_mac[3],
&ar711_base_mac[4], &ar711_base_mac[5]);
if (count < 6)
memset(ar711_base_mac, 0,
sizeof(ar711_base_mac));
}
}
}
/*
* Just wild guess. RedBoot let us down and didn't reported
* memory size
*/
if (realmem == 0)
realmem = btoc(32*1024*1024);
/* phys_avail regions are in bytes */
phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
phys_avail[1] = ctob(realmem);
physmem = realmem;
/*
* ns8250 uart code uses DELAY so ticker should be inititalized
* before cninit. And tick_init_params refers to hz, so * init_param1
* should be called first.
*/
init_param1();
platform_counter_freq = ar71xx_cpu_freq();
mips_timer_init_params(platform_counter_freq, 1);
cninit();
init_static_kenv(boot1_env, sizeof(boot1_env));
printf("platform frequency: %lld\n", platform_counter_freq);
printf("arguments: \n");
printf(" a0 = %08x\n", a0);
printf(" a1 = %08x\n", a1);
printf(" a2 = %08x\n", a2);
printf(" a3 = %08x\n", a3);
printf("Cmd line:");
if (MIPS_IS_VALID_PTR(argv)) {
for (i = 0; i < argc; i++) {
printf(" %s", argv[i]);
parse_argv(argv[i]);
}
}
else
printf ("argv is invalid");
printf("\n");
printf("Environment:\n");
if (MIPS_IS_VALID_PTR(envp)) {
for (i = 0; envp[i]; i+=2) {
printf(" %s = %s\n", envp[i], envp[i+1]);
setenv(envp[i], envp[i+1]);
}
}
else
printf ("envp is invalid\n");
init_param2(physmem);
mips_cpu_init();
pmap_bootstrap();
mips_proc0_init();
mutex_init();
/*
* Reset USB devices
*/
reg = ATH_READ_REG(AR71XX_RST_RESET);
reg |=
RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY;
ATH_WRITE_REG(AR71XX_RST_RESET, reg);
DELAY(1000);
reg &=
~(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
ATH_WRITE_REG(AR71XX_RST_RESET, reg);
ATH_WRITE_REG(AR71XX_USB_CTRL_CONFIG,
USB_CTRL_CONFIG_OHCI_DES_SWAP | USB_CTRL_CONFIG_OHCI_BUF_SWAP |
USB_CTRL_CONFIG_EHCI_DES_SWAP | USB_CTRL_CONFIG_EHCI_BUF_SWAP);
ATH_WRITE_REG(AR71XX_USB_CTRL_FLADJ,
(32 << USB_CTRL_FLADJ_HOST_SHIFT) | (3 << USB_CTRL_FLADJ_A5_SHIFT));
DELAY(1000);
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
