Commit fcfa66de authored Aug 05, 2013 by Florian Fainelli Committed by Ralf Baechle Aug 05, 2013

MIPS: BMIPS: fix hardware interrupt routing for boot CPU != 0



The hardware interrupt routing for boot CPU != 0 is wrong because it
will route all the hardware interrupts to TP0 which is not the one we
booted from. Fix this by properly checking which boot CPU we are booting
from and updating the right interrupt mask for the boot CPU. This fixes
booting on BCM3368 with bmips_smp_emabled = 0.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: blogic@openwrt.org
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/5650/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent cf5b2d23

arch/mips/kernel/smp-bmips.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -66,6 +66,8 @@ static void __init bmips_smp_setup(void)
		int i, cpu = 1, boot_cpu = 0;

		#if defined(CONFIG_CPU_BMIPS4350) \|\| defined(CONFIG_CPU_BMIPS4380)
		int cpu_hw_intr;

		/* arbitration priority */
		clear_c0_brcm_cmt_ctrl(0x30);

		@@ -80,8 +82,12 @@ static void __init bmips_smp_setup(void)
		* MIPS interrupt 2 (HW INT 0) is the CPU0 L1 controller output
		* MIPS interrupt 3 (HW INT 1) is the CPU1 L1 controller output
		*/
		change_c0_brcm_cmt_intr(0xf8018000,
		(0x02 << 27) \| (0x03 << 15));
		if (boot_cpu == 0)
		cpu_hw_intr = 0x02;
		else
		cpu_hw_intr = 0x1d;

		change_c0_brcm_cmt_intr(0xf8018000, (cpu_hw_intr << 27) \| (0x03 << 15));

		/* single core, 2 threads (2 pipelines) */
		max_cpus = 2;