arch/arm/mach-vexpress/v2m.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/of.h>
   3 #include <linux/of_address.h>
   4 #include <asm/mach/arch.h>
   5
   6 #include "core.h"
   7
   8 #define SYS_FLAGSSET            0x030
   9 #define SYS_FLAGSCLR            0x034
  10
  11 void vexpress_flags_set(u32 data)
  12 {
  13         static void __iomem *base;
  14
  15         if (!base) {
  16                 struct device_node *node = of_find_compatible_node(NULL, NULL,
  17                                 "arm,vexpress-sysreg");
  18
  19                 base = of_iomap(node, 0);
  20         }
  21
  22         if (WARN_ON(!base))
  23                 return;
  24
  25         writel(~0, base + SYS_FLAGSCLR);
  26         writel(data, base + SYS_FLAGSSET);
  27 }
  28
  29 static const char * const v2m_dt_match[] __initconst = {
  30         "arm,vexpress",
  31         NULL,
  32 };
  33
  34 DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
  35         .dt_compat      = v2m_dt_match,
  36         .l2c_aux_val    = 0x00400000,
  37         .l2c_aux_mask   = 0xfe0fffff,
  38         .smp            = smp_ops(vexpress_smp_dt_ops),
  39         .smp_init       = smp_init_ops(vexpress_smp_init_ops),
  40 MACHINE_END