xref: /openbmc/u-boot/arch/arm/mach-exynos/tzpc.c (revision e8f80a5a)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Lowlevel setup for SMDK5250 board based on S5PC520
4  *
5  * Copyright (C) 2012 Samsung Electronics
6  */
7 
8 #include <common.h>
9 #include <asm/arch/tzpc.h>
10 #include <asm/io.h>
11 
12 /* Setting TZPC[TrustZone Protection Controller] */
tzpc_init(void)13 void tzpc_init(void)
14 {
15 	struct exynos_tzpc *tzpc;
16 	unsigned int addr, start = 0, end = 0;
17 
18 	start = samsung_get_base_tzpc();
19 
20 	if (cpu_is_exynos5())
21 		end = start + ((EXYNOS5_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
22 	else if (cpu_is_exynos4())
23 		end = start + ((EXYNOS4_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
24 
25 	for (addr = start; addr <= end; addr += TZPC_BASE_OFFSET) {
26 		tzpc = (struct exynos_tzpc *)addr;
27 
28 		if (addr == start)
29 			writel(R0SIZE, &tzpc->r0size);
30 
31 		writel(DECPROTXSET, &tzpc->decprot0set);
32 		writel(DECPROTXSET, &tzpc->decprot1set);
33 
34 		if (cpu_is_exynos5() && (addr == end))
35 			break;
36 
37 		writel(DECPROTXSET, &tzpc->decprot2set);
38 		writel(DECPROTXSET, &tzpc->decprot3set);
39 	}
40 }
41