diff options
author | Sudeep Holla <Sudeep.Holla@arm.com> | 2016-09-23 16:38:39 (GMT) |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2016-10-07 14:26:30 (GMT) |
commit | 03ab5d136b43296b2eb7d4dd80196381aa719a09 (patch) | |
tree | b05d9b7c0e050af26a2be4380bc870b297dceac7 /board/armltd | |
parent | 43e0a3dec0a86a4e1a164f0b3839b6f1435c6685 (diff) | |
download | u-boot-03ab5d136b43296b2eb7d4dd80196381aa719a09.tar.xz |
vexpress: disable cci ace slave ports when booting in non-sec/hyp mode
Commit f225d39d3093 ("vexpress: Check TC2 firmware support before defaulting
to nonsec booting") added support to check if the firmware on TC2 is
configured appropriately before booting in nonsec/hyp mode.
However when booting in non-secure/hyp mode, CCI control must be done in
secure firmware and can't be done in non-secure/hyp mode. In order to
ensure that, this patch disables the cci slave port inteface so that it
is not accessed at all.
Cc: Jon Medhurst <tixy@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Jon Medhurst <tixy@linaro.org>
Tested-by: Jon Medhurst <tixy@linaro.org>
Diffstat (limited to 'board/armltd')
-rw-r--r-- | board/armltd/vexpress/vexpress_tc2.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/board/armltd/vexpress/vexpress_tc2.c b/board/armltd/vexpress/vexpress_tc2.c index ebb41a8..c7adf95 100644 --- a/board/armltd/vexpress/vexpress_tc2.c +++ b/board/armltd/vexpress/vexpress_tc2.c @@ -7,7 +7,11 @@ * SPDX-License-Identifier: GPL-2.0+ */ +#include <asm/armv7.h> #include <asm/io.h> +#include <asm/u-boot.h> +#include <common.h> +#include <libfdt.h> #define SCC_BASE 0x7fff0000 @@ -31,3 +35,51 @@ bool armv7_boot_nonsec_default(void) return (readl((u32 *)(SCC_BASE + 0x700)) & ((1 << 12) | (1 << 13))) == 0; #endif } + +#ifdef CONFIG_OF_BOARD_SETUP +int ft_board_setup(void *fdt, bd_t *bd) +{ + int offset, tmp, len; + const struct fdt_property *prop; + const char *cci_compatible = "arm,cci-400-ctrl-if"; + +#ifdef CONFIG_ARMV7_NONSEC + if (!armv7_boot_nonsec()) + return 0; +#else + return 0; +#endif + /* Booting in nonsec mode, disable CCI access */ + offset = fdt_path_offset(fdt, "/cpus"); + if (offset < 0) { + printf("couldn't find /cpus\n"); + return offset; + } + + /* delete cci-control-port in each cpu node */ + for (tmp = fdt_first_subnode(fdt, offset); tmp >= 0; + tmp = fdt_next_subnode(fdt, tmp)) + fdt_delprop(fdt, tmp, "cci-control-port"); + + /* disable all ace cci slave ports */ + offset = fdt_node_offset_by_prop_value(fdt, offset, "compatible", + cci_compatible, 20); + while (offset > 0) { + prop = fdt_get_property(fdt, offset, "interface-type", + &len); + if (!prop) + continue; + if (len < 4) + continue; + if (strcmp(prop->data, "ace")) + continue; + + fdt_setprop_string(fdt, offset, "status", "disabled"); + + offset = fdt_node_offset_by_prop_value(fdt, offset, "compatible", + cci_compatible, 20); + } + + return 0; +} +#endif /* CONFIG_OF_BOARD_SETUP */ |