xref: /openbmc/linux/arch/arm/mach-mmp/common.c (revision 77acc85c)
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 
mmp_map_io(void)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 
mmp2_map_io(void)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