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 }
73