Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / mach-omap2 / omap-secure.c
1 /*
2 * OMAP Secure API infrastructure.
3 *
4 * Copyright (C) 2011 Texas Instruments, Inc.
5 * Santosh Shilimkar <santosh.shilimkar@ti.com>
6 *
7 *
8 * This program is free software,you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/io.h>
16 #include <linux/memblock.h>
17
18 #include <asm/cacheflush.h>
19 #include <asm/memblock.h>
20
21 #include "omap-secure.h"
22
23 static phys_addr_t omap_secure_memblock_base;
24
25 /**
26 * omap_sec_dispatcher: Routine to dispatch low power secure
27 * service routines
28 * @idx: The HAL API index
29 * @flag: The flag indicating criticality of operation
30 * @nargs: Number of valid arguments out of four.
31 * @arg1, arg2, arg3 args4: Parameters passed to secure API
32 *
33 * Return the non-zero error value on failure.
34 */
35 u32 omap_secure_dispatcher(u32 idx, u32 flag, u32 nargs, u32 arg1, u32 arg2,
36 u32 arg3, u32 arg4)
37 {
38 u32 ret;
39 u32 param[5];
40
41 param[0] = nargs;
42 param[1] = arg1;
43 param[2] = arg2;
44 param[3] = arg3;
45 param[4] = arg4;
46
47 /*
48 * Secure API needs physical address
49 * pointer for the parameters
50 */
51 flush_cache_all();
52 outer_clean_range(__pa(param), __pa(param + 5));
53 ret = omap_smc2(idx, flag, __pa(param));
54
55 return ret;
56 }
57
58 /* Allocate the memory to save secure ram */
59 int __init omap_secure_ram_reserve_memblock(void)
60 {
61 u32 size = OMAP_SECURE_RAM_STORAGE;
62
63 size = ALIGN(size, SECTION_SIZE);
64 omap_secure_memblock_base = arm_memblock_steal(size, SECTION_SIZE);
65
66 return 0;
67 }
68
69 phys_addr_t omap_secure_ram_mempool_base(void)
70 {
71 return omap_secure_memblock_base;
72 }