target/linux/brcm2708/patches-4.1/0073-platform-Add-force_core-command-line-setting-to-boot.patch

   1 From a0a39e55d9cc36b1ca1094a7db8392134bdb4870 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Tue, 16 Jun 2015 17:47:27 +0100
   4 Subject: [PATCH 073/222] platform: Add force_core command line setting to boot
   5  from a different core number
   6
   7 ---
   8  arch/arm/mach-bcm2709/armctrl.c | 17 ++++++++++++++++-
   9  arch/arm/mach-bcm2709/bcm2709.c |  2 ++
  10  2 files changed, 18 insertions(+), 1 deletion(-)
  11
  12 --- a/arch/arm/mach-bcm2709/armctrl.c
  13 +++ b/arch/arm/mach-bcm2709/armctrl.c
  14 @@ -45,6 +45,8 @@ static unsigned int remap_irqs[(INTERRUP
  15         INTERRUPT_VC_ARASANSDIO
  16  };
  17
  18 +extern unsigned force_core;
  19 +
  20  static void armctrl_mask_irq(struct irq_data *d)
  21  {
  22         static const unsigned int disables[4] = {
  23 @@ -92,7 +94,13 @@ static void armctrl_unmask_irq(struct ir
  24         int i;
  25         if (d->irq >= FIQ_START) {
  26                 unsigned int data;
  27 -               if (num_online_cpus() > 1) {
  28 +               if (force_core) {
  29 +                       data = readl(__io_address(ARM_LOCAL_GPU_INT_ROUTING));
  30 +                       data &= ~0xc;
  31 +                       data |= ((force_core-1) << 2);
  32 +                       writel(data, __io_address(ARM_LOCAL_GPU_INT_ROUTING));
  33 +               }
  34 +               else if (num_online_cpus() > 1) {
  35                         data = readl(__io_address(ARM_LOCAL_GPU_INT_ROUTING));
  36                         data &= ~0xc;
  37                         data |= (1 << 2);
  38 @@ -119,6 +127,13 @@ static void armctrl_unmask_irq(struct ir
  39                 }
  40  #endif
  41         } else if (d->irq >= ARM_IRQ1_BASE && d->irq < ARM_IRQ_LOCAL_BASE) {
  42 +               if (force_core) {
  43 +                       unsigned int data;
  44 +                       data = readl(__io_address(ARM_LOCAL_GPU_INT_ROUTING));
  45 +                       data &= ~0x3;
  46 +                       data |= ((force_core-1) << 0);
  47 +                       writel(data, __io_address(ARM_LOCAL_GPU_INT_ROUTING));
  48 +               }
  49                 unsigned int data = (unsigned int)irq_get_chip_data(d->irq);
  50                 writel(1 << (data & 0x1f), __io_address(enables[(data >> 5) & 0x3]));
  51         } else if (d->irq == INTERRUPT_ARM_LOCAL_PMU_FAST) {
  52 --- a/arch/arm/mach-bcm2709/bcm2709.c
  53 +++ b/arch/arm/mach-bcm2709/bcm2709.c
  54 @@ -96,6 +96,7 @@ static unsigned w1_gpio_pin = W1_GPIO;
  55  static unsigned w1_gpio_pullup = W1_PULLUP;
  56  static bool vc_i2c_override = false;
  57  static int pps_gpio_pin = -1;
  58 +unsigned force_core;
  59
  60  static unsigned use_dt = 0;
  61
  62 @@ -1305,6 +1306,7 @@ MACHINE_START(BCM2708, "BCM2709")
  63         .dt_compat = bcm2709_compat,
  64  MACHINE_END
  65
  66 +module_param(force_core, uint, 0644);
  67  module_param(boardrev, uint, 0644);
  68  module_param(serial, uint, 0644);
  69  module_param(uart_clock, uint, 0644);