mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
a068dde168
This involves two changes to the BSP code: 1) register_smp_ops() for BMIPS SMP 2) The CPU1 boot vector on some of the BCM63xx platforms conflicts with the special interrupt vector (IV). Move it to 0x8000_0380 at boot time, to resolve the conflict. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> [jogo@openwrt.org: moved SMP ops registration into ifdef guard, changed ifdef guards to if (IS_ENABLED())] Signed-off-by: Jonas Gorski <jogo@openwrt.org> Cc: linux-mips@linux-mips.org Cc: John Crispin <blogic@openwrt.org> Cc: Maxime Bizon <mbizon@freebox.fr> Cc: Florian Fainelli <florian@openwrt.org> Patchwork: https://patchwork.linux-mips.org/patch/5489/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
|
|
* 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 <mbizon@freebox.fr>
|
|
*/
|
|
|
|
#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>
|
|
#include <bcm63xx_gpio.h>
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
u32 reg, mask;
|
|
|
|
bcm63xx_cpu_init();
|
|
|
|
/* 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;
|
|
else
|
|
mask = 0;
|
|
|
|
reg = bcm_perf_readl(PERF_CKCTL_REG);
|
|
reg &= ~mask;
|
|
bcm_perf_writel(reg, PERF_CKCTL_REG);
|
|
|
|
/* register gpiochip */
|
|
bcm63xx_gpio_init();
|
|
|
|
/* do low level board init */
|
|
board_prom_init();
|
|
|
|
if (IS_ENABLED(CONFIG_CPU_BMIPS4350) && IS_ENABLED(CONFIG_SMP)) {
|
|
/* set up SMP */
|
|
register_smp_ops(&bmips_smp_ops);
|
|
|
|
/*
|
|
* BCM6328 might not have its second CPU enabled, while BCM6358
|
|
* needs special handling for its shared TLB, so disable SMP
|
|
* for now.
|
|
*/
|
|
if (BCMCPU_IS_6328()) {
|
|
bmips_smp_enabled = 0;
|
|
} else if (BCMCPU_IS_6358()) {
|
|
bmips_smp_enabled = 0;
|
|
}
|
|
|
|
if (!bmips_smp_enabled)
|
|
return;
|
|
|
|
/*
|
|
* 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);
|
|
__sync();
|
|
set_c0_cause(C_SW0);
|
|
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)
|
|
{
|
|
}
|