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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4748a72402
Closed and signed Nokia X-Loader bootloader stored in RX-51 nand does not set
IBE bit in ACTLR and starting kernel in non-secure mode. So direct write to
ACTLR by our kernel does not working and the code for ARM errata 430973 in
commit 7ce236fcd6 that sets IBE bit is a noop.
In order to have workaround for ARM errata 430973 from non-secure world on
RX-51 we needs Secure Monitor Call to set IBE BIT in ACTLR.
This patch adds RX-51 specific secure support code and sets IBE bit in ACTLR
during board init code for ARM errata 430973 workaround.
Note that new function rx51_secure_dispatcher() differs from existing
omap_secure_dispatcher(). It calling omap_smc3() and param[0] is nargs+1.
ARM errata 430973 workaround is needed for thumb-2 ISA compiled userspace
binaries. Without this workaround thumb-2 binaries crashing. So with this
patch it is possible to recompile and run applications/binaries with thumb-2
ISA on RX-51.
Signed-off-by: Ivaylo Dimitrov <freemangordon@abv.bg>
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* Board support file for Nokia N900 (aka RX-51).
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*
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* Copyright (C) 2007, 2008 Nokia
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* Copyright (C) 2012 Ivaylo Dimitrov <freemangordon@abv.bg>
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* Copyright (C) 2013 Pali Rohár <pali.rohar@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/usb/phy.h>
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#include <linux/usb/musb.h>
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#include <linux/platform_data/spi-omap2-mcspi.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <linux/omap-dma.h>
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#include "common.h"
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#include "mux.h"
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#include "gpmc.h"
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#include "pm.h"
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#include "soc.h"
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#include "sdram-nokia.h"
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#include "omap-secure.h"
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#define RX51_GPIO_SLEEP_IND 162
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static struct gpio_led gpio_leds[] = {
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{
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.name = "sleep_ind",
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.gpio = RX51_GPIO_SLEEP_IND,
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},
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};
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static struct gpio_led_platform_data gpio_led_info = {
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.leds = gpio_leds,
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.num_leds = ARRAY_SIZE(gpio_leds),
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};
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static struct platform_device leds_gpio = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &gpio_led_info,
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},
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};
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/*
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* cpuidle C-states definition for rx51.
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*
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* The 'exit_latency' field is the sum of sleep
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* and wake-up latencies.
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---------------------------------------------
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| state | exit_latency | target_residency |
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---------------------------------------------
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| C1 | 110 + 162 | 5 |
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| C2 | 106 + 180 | 309 |
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| C3 | 107 + 410 | 46057 |
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| C4 | 121 + 3374 | 46057 |
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| C5 | 855 + 1146 | 46057 |
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| C6 | 7580 + 4134 | 484329 |
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| C7 | 7505 + 15274 | 484329 |
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---------------------------------------------
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*/
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extern void __init rx51_peripherals_init(void);
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#ifdef CONFIG_OMAP_MUX
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static struct omap_board_mux board_mux[] __initdata = {
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{ .reg_offset = OMAP_MUX_TERMINATOR },
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};
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#endif
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static struct omap_musb_board_data musb_board_data = {
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.interface_type = MUSB_INTERFACE_ULPI,
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.mode = MUSB_OTG,
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.power = 0,
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};
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static void __init rx51_init(void)
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{
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struct omap_sdrc_params *sdrc_params;
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omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
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omap_serial_init();
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sdrc_params = nokia_get_sdram_timings();
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omap_sdrc_init(sdrc_params, sdrc_params);
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usb_bind_phy("musb-hdrc.0.auto", 0, "twl4030_usb");
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usb_musb_init(&musb_board_data);
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rx51_peripherals_init();
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if (omap_type() == OMAP2_DEVICE_TYPE_SEC) {
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#ifdef CONFIG_ARM_ERRATA_430973
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pr_info("RX-51: Enabling ARM errata 430973 workaround\n");
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/* set IBE to 1 */
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rx51_secure_update_aux_cr(BIT(6), 0);
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#endif
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}
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/* Ensure SDRC pins are mux'd for self-refresh */
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omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
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omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
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platform_device_register(&leds_gpio);
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}
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static void __init rx51_reserve(void)
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{
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omap_reserve();
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}
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MACHINE_START(NOKIA_RX51, "Nokia RX-51 board")
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/* Maintainer: Lauri Leukkunen <lauri.leukkunen@nokia.com> */
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.atag_offset = 0x100,
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.reserve = rx51_reserve,
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.map_io = omap3_map_io,
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.init_early = omap3430_init_early,
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.init_irq = omap3_init_irq,
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.handle_irq = omap3_intc_handle_irq,
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.init_machine = rx51_init,
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.init_late = omap3430_init_late,
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.init_time = omap3_sync32k_timer_init,
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.restart = omap3xxx_restart,
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MACHINE_END
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