2 * OMAP Secure API infrastructure.
4 * Copyright (C) 2011 Texas Instruments, Inc.
5 * Santosh Shilimkar <santosh.shilimkar@ti.com>
6 * Copyright (C) 2012 Ivaylo Dimitrov <freemangordon@abv.bg>
7 * Copyright (C) 2013 Pali Rohár <pali.rohar@gmail.com>
10 * This program is free software,you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/kernel.h>
16 #include <linux/init.h>
18 #include <linux/memblock.h>
20 #include <asm/cacheflush.h>
21 #include <asm/memblock.h>
23 #include "omap-secure.h"
25 static phys_addr_t omap_secure_memblock_base;
28 * omap_sec_dispatcher: Routine to dispatch low power secure
30 * @idx: The HAL API index
31 * @flag: The flag indicating criticality of operation
32 * @nargs: Number of valid arguments out of four.
33 * @arg1, arg2, arg3 args4: Parameters passed to secure API
35 * Return the non-zero error value on failure.
37 u32 omap_secure_dispatcher(u32 idx, u32 flag, u32 nargs, u32 arg1, u32 arg2,
50 * Secure API needs physical address
51 * pointer for the parameters
54 outer_clean_range(__pa(param), __pa(param + 5));
55 ret = omap_smc2(idx, flag, __pa(param));
60 /* Allocate the memory to save secure ram */
61 int __init omap_secure_ram_reserve_memblock(void)
63 u32 size = OMAP_SECURE_RAM_STORAGE;
65 size = ALIGN(size, SECTION_SIZE);
66 omap_secure_memblock_base = arm_memblock_steal(size, SECTION_SIZE);
71 phys_addr_t omap_secure_ram_mempool_base(void)
73 return omap_secure_memblock_base;
76 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
77 u32 omap3_save_secure_ram(void __iomem *addr, int size)
82 if (size != OMAP3_SAVE_SECURE_RAM_SZ)
83 return OMAP3_SAVE_SECURE_RAM_SZ;
85 param[0] = 4; /* Number of arguments */
86 param[1] = __pa(addr); /* Physical address for saving */
91 ret = save_secure_ram_context(__pa(param));
98 * rx51_secure_dispatcher: Routine to dispatch secure PPA API calls
99 * @idx: The PPA API index
100 * @process: Process ID
101 * @flag: The flag indicating criticality of operation
102 * @nargs: Number of valid arguments out of four.
103 * @arg1, arg2, arg3 args4: Parameters passed to secure API
105 * Return the non-zero error value on failure.
107 * NOTE: rx51_secure_dispatcher differs from omap_secure_dispatcher because
108 * it calling omap_smc3() instead omap_smc2() and param[0] is nargs+1
110 u32 rx51_secure_dispatcher(u32 idx, u32 process, u32 flag, u32 nargs,
111 u32 arg1, u32 arg2, u32 arg3, u32 arg4)
116 param[0] = nargs+1; /* RX-51 needs number of arguments + 1 */
123 * Secure API needs physical address
124 * pointer for the parameters
129 outer_clean_range(__pa(param), __pa(param + 5));
130 ret = omap_smc3(idx, process, flag, __pa(param));
139 * rx51_secure_update_aux_cr: Routine to modify the contents of Auxiliary Control Register
140 * @set_bits: bits to set in ACR
141 * @clr_bits: bits to clear in ACR
143 * Return the non-zero error value on failure.
145 u32 rx51_secure_update_aux_cr(u32 set_bits, u32 clear_bits)
150 asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
154 return rx51_secure_dispatcher(RX51_PPA_WRITE_ACR,
161 * rx51_secure_rng_call: Routine for HW random generator
163 u32 rx51_secure_rng_call(u32 ptr, u32 count, u32 flag)
165 return rx51_secure_dispatcher(RX51_PPA_HWRNG,
168 3, ptr, count, flag, 0);