LXR linux/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
  11void 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
  29static const char * const v2m_dt_match[] __initconst = {
  30        "arm,vexpress",
  31        NULL,
  32};
  33
  34DT_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),
  40MACHINE_END
  41