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Jon Medhurst \(Tixy\)413ca3d2016-06-23 13:37:32 +01001/*
2 * (C) Copyright 2016 Linaro
3 * Jon Medhurst <tixy@linaro.org>
4 *
5 * TC2 specific code for Versatile Express.
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
Sudeep Hollab1bb4d32016-09-23 17:38:39 +010010#include <asm/armv7.h>
Jon Medhurst \(Tixy\)413ca3d2016-06-23 13:37:32 +010011#include <asm/io.h>
Sudeep Hollab1bb4d32016-09-23 17:38:39 +010012#include <asm/u-boot.h>
13#include <common.h>
14#include <libfdt.h>
Jon Medhurst \(Tixy\)413ca3d2016-06-23 13:37:32 +010015
16#define SCC_BASE 0x7fff0000
17
18bool armv7_boot_nonsec_default(void)
19{
20#ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
21 return false
22#else
23 /*
24 * The Serial Configuration Controller (SCC) register at address 0x700
25 * contains flags for configuring the behaviour of the Boot Monitor
26 * (which CPUs execute from reset). Two of these bits are of interest:
27 *
28 * bit 12 = Use per-cpu mailboxes for power management
29 * bit 13 = Power down the non-boot cluster
30 *
31 * It is only when both of these are false that U-Boot's current
32 * implementation of 'nonsec' mode can work as expected because we
33 * rely on getting all CPUs to execute _nonsec_init, so let's check that.
34 */
35 return (readl((u32 *)(SCC_BASE + 0x700)) & ((1 << 12) | (1 << 13))) == 0;
36#endif
37}
Sudeep Hollab1bb4d32016-09-23 17:38:39 +010038
39#ifdef CONFIG_OF_BOARD_SETUP
40int ft_board_setup(void *fdt, bd_t *bd)
41{
42 int offset, tmp, len;
43 const struct fdt_property *prop;
44 const char *cci_compatible = "arm,cci-400-ctrl-if";
45
46#ifdef CONFIG_ARMV7_NONSEC
47 if (!armv7_boot_nonsec())
48 return 0;
49#else
50 return 0;
51#endif
52 /* Booting in nonsec mode, disable CCI access */
53 offset = fdt_path_offset(fdt, "/cpus");
54 if (offset < 0) {
55 printf("couldn't find /cpus\n");
56 return offset;
57 }
58
59 /* delete cci-control-port in each cpu node */
60 for (tmp = fdt_first_subnode(fdt, offset); tmp >= 0;
61 tmp = fdt_next_subnode(fdt, tmp))
62 fdt_delprop(fdt, tmp, "cci-control-port");
63
64 /* disable all ace cci slave ports */
65 offset = fdt_node_offset_by_prop_value(fdt, offset, "compatible",
66 cci_compatible, 20);
67 while (offset > 0) {
68 prop = fdt_get_property(fdt, offset, "interface-type",
69 &len);
70 if (!prop)
71 continue;
72 if (len < 4)
73 continue;
74 if (strcmp(prop->data, "ace"))
75 continue;
76
77 fdt_setprop_string(fdt, offset, "status", "disabled");
78
79 offset = fdt_node_offset_by_prop_value(fdt, offset, "compatible",
80 cci_compatible, 20);
81 }
82
83 return 0;
84}
85#endif /* CONFIG_OF_BOARD_SETUP */