diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0002-ARM-msm-Remove-pen_release-usage.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0002-ARM-msm-Remove-pen_release-usage.patch | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/target/linux/ipq806x/patches/0002-ARM-msm-Remove-pen_release-usage.patch b/target/linux/ipq806x/patches/0002-ARM-msm-Remove-pen_release-usage.patch deleted file mode 100644 index 19eaae62e5..0000000000 --- a/target/linux/ipq806x/patches/0002-ARM-msm-Remove-pen_release-usage.patch +++ /dev/null @@ -1,211 +0,0 @@ -From 18d53dfa103e63154fb8e548d55016d6ad210d28 Mon Sep 17 00:00:00 2001 -From: Rohit Vaswani <rvaswani@codeaurora.org> -Date: Fri, 21 Jun 2013 12:17:37 -0700 -Subject: [PATCH 002/182] ARM: msm: Remove pen_release usage - -pen_release is no longer required as the synchronization -is now managed by generic arm code. -This is done as suggested in https://lkml.org/lkml/2013/6/4/184 - -Cc: Russell King <linux@arm.linux.org.uk> -Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org> -Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> -Signed-off-by: Kumar Gala <galak@codeaurora.org> ---- - arch/arm/mach-msm/Makefile | 2 +- - arch/arm/mach-msm/headsmp.S | 39 --------------------------------------- - arch/arm/mach-msm/hotplug.c | 31 ++++--------------------------- - arch/arm/mach-msm/platsmp.c | 37 +++---------------------------------- - 4 files changed, 8 insertions(+), 101 deletions(-) - delete mode 100644 arch/arm/mach-msm/headsmp.S - ---- a/arch/arm/mach-msm/Makefile -+++ b/arch/arm/mach-msm/Makefile -@@ -19,7 +19,7 @@ obj-$(CONFIG_MSM_SCM) += scm.o scm-boot. - CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1) - - obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o --obj-$(CONFIG_SMP) += headsmp.o platsmp.o -+obj-$(CONFIG_SMP) += platsmp.o - - obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o board-trout-mmc.o devices-msm7x00.o - obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o board-trout-mmc.o board-trout-panel.o devices-msm7x00.o ---- a/arch/arm/mach-msm/headsmp.S -+++ /dev/null -@@ -1,39 +0,0 @@ --/* -- * linux/arch/arm/mach-realview/headsmp.S -- * -- * Copyright (c) 2003 ARM Limited -- * All Rights Reserved -- * -- * This program is free software; you can redistribute it and/or modify -- * it under the terms of the GNU General Public License version 2 as -- * published by the Free Software Foundation. -- */ --#include <linux/linkage.h> --#include <linux/init.h> -- --/* -- * MSM specific entry point for secondary CPUs. This provides -- * a "holding pen" into which all secondary cores are held until we're -- * ready for them to initialise. -- */ --ENTRY(msm_secondary_startup) -- mrc p15, 0, r0, c0, c0, 5 -- and r0, r0, #15 -- adr r4, 1f -- ldmia r4, {r5, r6} -- sub r4, r4, r5 -- add r6, r6, r4 --pen: ldr r7, [r6] -- cmp r7, r0 -- bne pen -- -- /* -- * we've been released from the holding pen: secondary_stack -- * should now contain the SVC stack for this core -- */ -- b secondary_startup --ENDPROC(msm_secondary_startup) -- -- .align --1: .long . -- .long pen_release ---- a/arch/arm/mach-msm/hotplug.c -+++ b/arch/arm/mach-msm/hotplug.c -@@ -24,33 +24,10 @@ static inline void cpu_leave_lowpower(vo - - static inline void platform_do_lowpower(unsigned int cpu) - { -- /* Just enter wfi for now. TODO: Properly shut off the cpu. */ -- for (;;) { -- /* -- * here's the WFI -- */ -- asm("wfi" -- : -- : -- : "memory", "cc"); -- -- if (pen_release == cpu_logical_map(cpu)) { -- /* -- * OK, proper wakeup, we're done -- */ -- break; -- } -- -- /* -- * getting here, means that we have come out of WFI without -- * having been woken up - this shouldn't happen -- * -- * The trouble is, letting people know about this is not really -- * possible, since we are currently running incoherently, and -- * therefore cannot safely call printk() or anything else -- */ -- pr_debug("CPU%u: spurious wakeup call\n", cpu); -- } -+ asm("wfi" -+ : -+ : -+ : "memory", "cc"); - } - - /* ---- a/arch/arm/mach-msm/platsmp.c -+++ b/arch/arm/mach-msm/platsmp.c -@@ -12,13 +12,10 @@ - #include <linux/errno.h> - #include <linux/delay.h> - #include <linux/device.h> --#include <linux/jiffies.h> - #include <linux/smp.h> - #include <linux/io.h> - --#include <asm/cacheflush.h> - #include <asm/cputype.h> --#include <asm/mach-types.h> - #include <asm/smp_plat.h> - - #include "scm-boot.h" -@@ -28,7 +25,7 @@ - #define SCSS_CPU1CORE_RESET 0xD80 - #define SCSS_DBG_STATUS_CORE_PWRDUP 0xE64 - --extern void msm_secondary_startup(void); -+extern void secondary_startup(void); - - static DEFINE_SPINLOCK(boot_lock); - -@@ -41,13 +38,6 @@ static inline int get_core_count(void) - static void msm_secondary_init(unsigned int cpu) - { - /* -- * let the primary processor know we're out of the -- * pen, then head off into the C entry point -- */ -- pen_release = -1; -- smp_wmb(); -- -- /* - * Synchronise with the boot thread. - */ - spin_lock(&boot_lock); -@@ -57,7 +47,7 @@ static void msm_secondary_init(unsigned - static void prepare_cold_cpu(unsigned int cpu) - { - int ret; -- ret = scm_set_boot_addr(virt_to_phys(msm_secondary_startup), -+ ret = scm_set_boot_addr(virt_to_phys(secondary_startup), - SCM_FLAG_COLDBOOT_CPU1); - if (ret == 0) { - void __iomem *sc1_base_ptr; -@@ -75,7 +65,6 @@ static void prepare_cold_cpu(unsigned in - - static int msm_boot_secondary(unsigned int cpu, struct task_struct *idle) - { -- unsigned long timeout; - static int cold_boot_done; - - /* Only need to bring cpu out of reset this way once */ -@@ -91,39 +80,19 @@ static int msm_boot_secondary(unsigned i - spin_lock(&boot_lock); - - /* -- * The secondary processor is waiting to be released from -- * the holding pen - release it, then wait for it to flag -- * that it has been released by resetting pen_release. -- * -- * Note that "pen_release" is the hardware CPU ID, whereas -- * "cpu" is Linux's internal ID. -- */ -- pen_release = cpu_logical_map(cpu); -- sync_cache_w(&pen_release); -- -- /* - * Send the secondary CPU a soft interrupt, thereby causing - * the boot monitor to read the system wide flags register, - * and branch to the address found there. - */ - arch_send_wakeup_ipi_mask(cpumask_of(cpu)); - -- timeout = jiffies + (1 * HZ); -- while (time_before(jiffies, timeout)) { -- smp_rmb(); -- if (pen_release == -1) -- break; -- -- udelay(10); -- } -- - /* - * now the secondary core is starting up let it run its - * calibrations, then wait for it to finish - */ - spin_unlock(&boot_lock); - -- return pen_release != -1 ? -ENOSYS : 0; -+ return 0; - } - - /* |