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 <plat/omap-secure.h>
22 #include "omap-secure.h"
23 
24 static phys_addr_t omap_secure_memblock_base;
25 
26 /**
27  * omap_sec_dispatcher: Routine to dispatch low power secure
28  * service routines
29  * @idx: The HAL API index
30  * @flag: The flag indicating criticality of operation
31  * @nargs: Number of valid arguments out of four.
32  * @arg1, arg2, arg3 args4: Parameters passed to secure API
33  *
34  * Return the non-zero error value on failure.
35  */
36 u32 omap_secure_dispatcher(u32 idx, u32 flag, u32 nargs, u32 arg1, u32 arg2,
37 							 u32 arg3, u32 arg4)
38 {
39 	u32 ret;
40 	u32 param[5];
41 
42 	param[0] = nargs;
43 	param[1] = arg1;
44 	param[2] = arg2;
45 	param[3] = arg3;
46 	param[4] = arg4;
47 
48 	/*
49 	 * Secure API needs physical address
50 	 * pointer for the parameters
51 	 */
52 	flush_cache_all();
53 	outer_clean_range(__pa(param), __pa(param + 5));
54 	ret = omap_smc2(idx, flag, __pa(param));
55 
56 	return ret;
57 }
58 
59 /* Allocate the memory to save secure ram */
60 int __init omap_secure_ram_reserve_memblock(void)
61 {
62 	u32 size = OMAP_SECURE_RAM_STORAGE;
63 
64 	size = ALIGN(size, SZ_1M);
65 	omap_secure_memblock_base = arm_memblock_steal(size, SZ_1M);
66 
67 	return 0;
68 }
69 
70 phys_addr_t omap_secure_ram_mempool_base(void)
71 {
72 	return omap_secure_memblock_base;
73 }
74