arm/mach-versatile/v2m.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <linux/of.h>
0003 #include <linux/of_address.h>
0004 #include <asm/mach/arch.h>
0005
0006 #include "vexpress.h"
0007
0008 #define SYS_FLAGSSET        0x030
0009 #define SYS_FLAGSCLR        0x034
0010
0011 void vexpress_flags_set(u32 data)
0012 {
0013     static void __iomem *base;
0014
0015     if (!base) {
0016         struct device_node *node = of_find_compatible_node(NULL, NULL,
0017                 "arm,vexpress-sysreg");
0018
0019         base = of_iomap(node, 0);
0020     }
0021
0022     if (WARN_ON(!base))
0023         return;
0024
0025     writel(~0, base + SYS_FLAGSCLR);
0026     writel(data, base + SYS_FLAGSSET);
0027 }
0028
0029 static const char * const v2m_dt_match[] __initconst = {
0030     "arm,vexpress",
0031     NULL,
0032 };
0033
0034 DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
0035     .dt_compat  = v2m_dt_match,
0036     .l2c_aux_val    = 0x00400000,
0037     .l2c_aux_mask   = 0xfe0fffff,
0038     .smp        = smp_ops(vexpress_smp_dt_ops),
0039     .smp_init   = smp_init_ops(vexpress_smp_init_ops),
0040 MACHINE_END