blob: 7019e2967009e98e6f6191c1e86969d4663a957f [file] [log] [blame]
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
* Copyright (C) 2008 Maxime Bizon <>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/smp.h>
#include <asm/bootinfo.h>
#include <asm/bmips.h>
#include <asm/smp-ops.h>
#include <asm/mipsregs.h>
#include <bcm63xx_board.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
void __init prom_init(void)
u32 reg, mask;
/* stop any running watchdog */
bcm_wdt_writel(WDT_STOP_1, WDT_CTL_REG);
bcm_wdt_writel(WDT_STOP_2, WDT_CTL_REG);
/* disable all hardware blocks clock for now */
if (BCMCPU_IS_3368())
mask = CKCTL_3368_ALL_SAFE_EN;
else if (BCMCPU_IS_6328())
mask = CKCTL_6328_ALL_SAFE_EN;
else if (BCMCPU_IS_6338())
mask = CKCTL_6338_ALL_SAFE_EN;
else if (BCMCPU_IS_6345())
mask = CKCTL_6345_ALL_SAFE_EN;
else if (BCMCPU_IS_6348())
mask = CKCTL_6348_ALL_SAFE_EN;
else if (BCMCPU_IS_6358())
mask = CKCTL_6358_ALL_SAFE_EN;
else if (BCMCPU_IS_6362())
mask = CKCTL_6362_ALL_SAFE_EN;
else if (BCMCPU_IS_6368())
mask = CKCTL_6368_ALL_SAFE_EN;
mask = 0;
reg = bcm_perf_readl(PERF_CKCTL_REG);
reg &= ~mask;
bcm_perf_writel(reg, PERF_CKCTL_REG);
/* do low level board init */
/* set up SMP */
if (!register_bmips_smp_ops()) {
* BCM6328 might not have its second CPU enabled, while BCM3368
* and BCM6358 need special handling for their shared TLB, so
* disable SMP for now.
if (BCMCPU_IS_6328()) {
reg = bcm_readl(BCM_6328_OTP_BASE +
if (reg & OTP_6328_REG3_TP1_DISABLED)
bmips_smp_enabled = 0;
} else if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) {
bmips_smp_enabled = 0;
if (!bmips_smp_enabled)
* The bootloader has set up the CPU1 reset vector at
* 0xa000_0200.
* This conflicts with the special interrupt vector (IV).
* The bootloader has also set up CPU1 to respond to the wrong
* IPI interrupt.
* Here we will start up CPU1 in the background and ask it to
* reconfigure itself then go back to sleep.
memcpy((void *)0xa0000200, &bmips_smp_movevec, 0x20);
cpumask_set_cpu(1, &bmips_booted_mask);
* FIXME: we really should have some sort of hazard barrier here
void __init prom_free_prom_memory(void)