1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * linux/arch/arm/mach-mmp/common.c |
4 | * |
5 | * Code common to PXA168 processor lines |
6 | */ |
7 | |
8 | #include <linux/init.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/module.h> |
11 | |
12 | #include <asm/page.h> |
13 | #include <asm/mach/map.h> |
14 | #include <asm/system_misc.h> |
15 | #include "addr-map.h" |
16 | #include <linux/soc/mmp/cputype.h> |
17 | |
18 | #include "common.h" |
19 | |
20 | #define MMP_CHIPID CIU_REG(0x00) |
21 | |
22 | unsigned int mmp_chip_id; |
23 | EXPORT_SYMBOL(mmp_chip_id); |
24 | |
25 | static struct map_desc standard_io_desc[] __initdata = { |
26 | { |
27 | .pfn = __phys_to_pfn(APB_PHYS_BASE), |
28 | .virtual = (unsigned long)APB_VIRT_BASE, |
29 | .length = APB_PHYS_SIZE, |
30 | .type = MT_DEVICE, |
31 | }, { |
32 | .pfn = __phys_to_pfn(AXI_PHYS_BASE), |
33 | .virtual = (unsigned long)AXI_VIRT_BASE, |
34 | .length = AXI_PHYS_SIZE, |
35 | .type = MT_DEVICE, |
36 | }, |
37 | }; |
38 | |
39 | static struct map_desc mmp2_io_desc[] __initdata = { |
40 | { |
41 | .pfn = __phys_to_pfn(PGU_PHYS_BASE), |
42 | .virtual = (unsigned long)PGU_VIRT_BASE, |
43 | .length = PGU_PHYS_SIZE, |
44 | .type = MT_DEVICE, |
45 | }, |
46 | }; |
47 | |
48 | void __init mmp_map_io(void) |
49 | { |
50 | iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); |
51 | |
52 | /* this is early, initialize mmp_chip_id here */ |
53 | mmp_chip_id = __raw_readl(MMP_CHIPID); |
54 | } |
55 | |
56 | void __init mmp2_map_io(void) |
57 | { |
58 | mmp_map_io(); |
59 | iotable_init(mmp2_io_desc, ARRAY_SIZE(mmp2_io_desc)); |
60 | } |
61 | |