brcm63xx: add linux 3.10 support

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37481 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 89 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-3.10/042-MIPS-BMIPS-support-booting-from-physical-CPU-other-t.patch b/target/linux/brcm63xx/patches-3.10/042-MIPS-BMIPS-support-booting-from-physical-CPU-other-t.patch
new file mode 100644
index 0000000000..7d0506f5e8
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.10/042-MIPS-BMIPS-support-booting-from-physical-CPU-other-t.patch
@@ -0,0 +1,89 @@
+From 672d6bea85c7c9c63c086a9423e6d4e5fc286152 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <florian@openwrt.org>
+Date: Wed, 26 Jun 2013 18:11:56 +0000
+Subject: [PATCH] MIPS: BMIPS: support booting from physical CPU other than 0
+
+BMIPS43xx CPUs have two hardware threads, and on some SoCs such as 3368,
+the bootloader has configured the system to boot from TP1 instead of the
+more usual TP0. Create the physical to logical CPU mapping to cope with
+that, do not remap the software interrupts to be cross CPUs such that we
+do not have to do use the logical CPU mapping further down the code, and
+finally, reset the slave TP1 only if booted from TP0.
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+Cc: linux-mips@linux-mips.org
+Cc: blogic@openwrt.org
+Cc: cernekee@gmail.com
+Patchwork: https://patchwork.linux-mips.org/patch/5553/
+Patchwork: https://patchwork.linux-mips.org/patch/5556/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/kernel/smp-bmips.c |   29 +++++++++++++++++++++++------
+ 1 file changed, 23 insertions(+), 6 deletions(-)
+
+--- a/arch/mips/kernel/smp-bmips.c
++++ b/arch/mips/kernel/smp-bmips.c
+@@ -63,7 +63,7 @@ static irqreturn_t bmips_ipi_interrupt(i
+ 
+ static void __init bmips_smp_setup(void)
+ {
+-	int i;
++	int i, cpu = 1, boot_cpu = 0;
+ 
+ #if defined(CONFIG_CPU_BMIPS4350) || defined(CONFIG_CPU_BMIPS4380)
+ 	/* arbitration priority */
+@@ -72,13 +72,22 @@ static void __init bmips_smp_setup(void)
+ 	/* NBK and weak order flags */
+ 	set_c0_brcm_config_0(0x30000);
+ 
++	/* Find out if we are running on TP0 or TP1 */
++	boot_cpu = !!(read_c0_brcm_cmt_local() & (1 << 31));
++
+ 	/*
+ 	 * MIPS interrupts 0,1 (SW INT 0,1) cross over to the other thread
+ 	 * MIPS interrupt 2 (HW INT 0) is the CPU0 L1 controller output
+ 	 * MIPS interrupt 3 (HW INT 1) is the CPU1 L1 controller output
++	 *
++	 * If booting from TP1, leave the existing CMT interrupt routing
++	 * such that TP0 responds to SW1 and TP1 responds to SW0.
+ 	 */
+-	change_c0_brcm_cmt_intr(0xf8018000,
+-		(0x02 << 27) | (0x03 << 15));
++	if (boot_cpu == 0)
++		change_c0_brcm_cmt_intr(0xf8018000,
++					(0x02 << 27) | (0x03 << 15));
++	else
++		change_c0_brcm_cmt_intr(0xf8018000, (0x1d << 27));
+ 
+ 	/* single core, 2 threads (2 pipelines) */
+ 	max_cpus = 2;
+@@ -106,9 +115,15 @@ static void __init bmips_smp_setup(void)
+ 	if (!board_ebase_setup)
+ 		board_ebase_setup = &bmips_ebase_setup;
+ 
++	__cpu_number_map[boot_cpu] = 0;
++	__cpu_logical_map[0] = boot_cpu;
++
+ 	for (i = 0; i < max_cpus; i++) {
+-		__cpu_number_map[i] = 1;
+-		__cpu_logical_map[i] = 1;
++		if (i != boot_cpu) {
++			__cpu_number_map[i] = cpu;
++			__cpu_logical_map[cpu] = i;
++			cpu++;
++		}
+ 		set_cpu_possible(i, 1);
+ 		set_cpu_present(i, 1);
+ 	}
+@@ -157,7 +172,9 @@ static void bmips_boot_secondary(int cpu
+ 		bmips_send_ipi_single(cpu, 0);
+ 	else {
+ #if defined(CONFIG_CPU_BMIPS4350) || defined(CONFIG_CPU_BMIPS4380)
+-		set_c0_brcm_cmt_ctrl(0x01);
++		/* Reset slave TP1 if booting from TP0 */
++		if (cpu_logical_map(cpu) == 0)
++			set_c0_brcm_cmt_ctrl(0x01);
+ #elif defined(CONFIG_CPU_BMIPS5000)
+ 		if (cpu & 0x01)
+ 			write_c0_brcm_action(ACTION_BOOT_THREAD(cpu));