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 "vexpress.h"
7
8 #define SYS_FLAGSSET 0x030
9 #define SYS_FLAGSCLR 0x034
10
vexpress_flags_set(u32 data)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
41