blob: 72bfbd9665e395eeabc1907337939b1ff0376ade [file] [log] [blame]
/*
* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <libfdt.h>
#include <platform_def.h>
#include <arch.h>
#include <arch_helpers.h>
#include <common/debug.h>
#include <common/fdt_fixup.h>
#include <common/fdt_wrappers.h>
#include <drivers/arm/gicv2.h>
#include <drivers/console.h>
#include <drivers/generic_delay_timer.h>
#include <drivers/ti/uart/uart_16550.h>
#include <lib/mmio.h>
#include <plat/common/platform.h>
#include <sunxi_def.h>
#include <sunxi_mmap.h>
#include <sunxi_private.h>
static entry_point_info_t bl32_image_ep_info;
static entry_point_info_t bl33_image_ep_info;
static console_t console;
static const gicv2_driver_data_t sunxi_gic_data = {
.gicd_base = SUNXI_GICD_BASE,
.gicc_base = SUNXI_GICC_BASE,
};
/*
* Try to find a DTB loaded in memory by previous stages.
*
* At the moment we implement a heuristic to find the DTB attached to U-Boot:
* U-Boot appends its DTB to the end of the image. Assuming that BL33 is
* U-Boot, try to find the size of the U-Boot image to learn the DTB address.
* The generic ARMv8 U-Boot image contains the load address and its size
* as u64 variables at the beginning of the image. There might be padding
* or other headers before that data, so scan the first 2KB after the BL33
* entry point to find the load address, which should be followed by the
* size. Adding those together gives us the address of the DTB.
*/
static void *sunxi_find_dtb(void)
{
uint64_t *u_boot_base;
int i;
u_boot_base = (void *)SUNXI_BL33_VIRT_BASE;
for (i = 0; i < 2048 / sizeof(uint64_t); i++) {
uint32_t *dtb_base;
if (u_boot_base[i] != PRELOADED_BL33_BASE)
continue;
/* Does the suspected U-Boot size look anyhow reasonable? */
if (u_boot_base[i + 1] >= 256 * 1024 * 1024)
continue;
/* end of the image: base address + size */
dtb_base = (void *)((char *)u_boot_base + u_boot_base[i + 1]);
if (fdt_check_header(dtb_base) != 0)
continue;
return dtb_base;
}
return NULL;
}
void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
u_register_t arg2, u_register_t arg3)
{
/* Initialize the debug console as soon as possible */
console_16550_register(SUNXI_UART0_BASE, SUNXI_UART0_CLK_IN_HZ,
SUNXI_UART0_BAUDRATE, &console);
#ifdef BL32_BASE
/* Populate entry point information for BL32 */
SET_PARAM_HEAD(&bl32_image_ep_info, PARAM_EP, VERSION_1, 0);
SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE);
bl32_image_ep_info.pc = BL32_BASE;
#endif
/* Populate entry point information for BL33 */
SET_PARAM_HEAD(&bl33_image_ep_info, PARAM_EP, VERSION_1, 0);
/*
* Tell BL31 where the non-trusted software image
* is located and the entry state information
*/
bl33_image_ep_info.pc = PRELOADED_BL33_BASE;
bl33_image_ep_info.spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
}
void bl31_plat_arch_setup(void)
{
sunxi_configure_mmu_el3(0);
}
void bl31_platform_setup(void)
{
const char *soc_name;
uint16_t soc_id = sunxi_read_soc_id();
void *fdt;
switch (soc_id) {
case SUNXI_SOC_A64:
soc_name = "A64/H64/R18";
break;
case SUNXI_SOC_H5:
soc_name = "H5";
break;
case SUNXI_SOC_H6:
soc_name = "H6";
break;
case SUNXI_SOC_H616:
soc_name = "H616";
break;
default:
soc_name = "unknown";
break;
}
NOTICE("BL31: Detected Allwinner %s SoC (%04x)\n", soc_name, soc_id);
generic_delay_timer_init();
fdt = sunxi_find_dtb();
if (fdt) {
const char *model;
int length;
model = fdt_getprop(fdt, 0, "model", &length);
NOTICE("BL31: Found U-Boot DTB at %p, model: %s\n", fdt,
model ?: "unknown");
} else {
NOTICE("BL31: No DTB found.\n");
}
/* Configure the interrupt controller */
gicv2_driver_init(&sunxi_gic_data);
gicv2_distif_init();
gicv2_pcpu_distif_init();
gicv2_cpuif_enable();
sunxi_security_setup();
/*
* On the A64 U-Boot's SPL sets the bus clocks to some conservative
* values, to work around FEL mode instabilities with SRAM C accesses.
* FEL mode is gone when we reach ATF, so bring the AHB1 bus
* (the "main" bus) clock frequency back to the recommended 200MHz,
* for improved performance.
*/
if (soc_id == SUNXI_SOC_A64)
mmio_write_32(SUNXI_CCU_BASE + 0x54, 0x00003180);
/*
* U-Boot or the kernel don't setup AHB2, which leaves it at the
* AHB1 frequency (200 MHz, see above). However Allwinner recommends
* 300 MHz, for improved Ethernet and USB performance. Switch the
* clock to use "PLL_PERIPH0 / 2".
*/
if (soc_id == SUNXI_SOC_A64 || soc_id == SUNXI_SOC_H5)
mmio_write_32(SUNXI_CCU_BASE + 0x5c, 0x1);
sunxi_pmic_setup(soc_id, fdt);
sunxi_prepare_dtb(fdt);
INFO("BL31: Platform setup done\n");
}
entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
{
assert(sec_state_is_valid(type) != 0);
if (type == NON_SECURE)
return &bl33_image_ep_info;
if ((type == SECURE) && bl32_image_ep_info.pc)
return &bl32_image_ep_info;
return NULL;
}