blob: 8cba5c5215d938a0b4c804084640d692a2a988f5 [file] [log] [blame]
/*
* Copyright (c) 2021-2023, Stephan Gerhold <stephan@gerhold.net>
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <arch.h>
#include <common/debug.h>
#include <drivers/console.h>
#include <drivers/generic_delay_timer.h>
#include <lib/mmio.h>
#include <lib/xlat_tables/xlat_mmu_helpers.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <plat/common/platform.h>
#include "msm8916_gicv2.h"
#include <msm8916_mmap.h>
#include <platform_def.h>
#include <uartdm_console.h>
static const mmap_region_t msm8916_mmap[] = {
MAP_REGION_FLAT(PCNOC_BASE, PCNOC_SIZE,
MT_DEVICE | MT_RW | MT_SECURE | MT_EXECUTE_NEVER),
MAP_REGION_FLAT(APCS_BASE, APCS_SIZE,
MT_DEVICE | MT_RW | MT_SECURE | MT_EXECUTE_NEVER),
{},
};
static struct {
entry_point_info_t bl32;
entry_point_info_t bl33;
} image_ep_info = {
/* BL32 entry point */
SET_STATIC_PARAM_HEAD(bl32, PARAM_EP, VERSION_1,
entry_point_info_t, SECURE),
.bl32.pc = BL32_BASE,
/* BL33 entry point */
SET_STATIC_PARAM_HEAD(bl33, PARAM_EP, VERSION_1,
entry_point_info_t, NON_SECURE),
.bl33.pc = PRELOADED_BL33_BASE,
.bl33.spsr = SPSR_64(MODE_EL2, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS),
};
static console_t console;
unsigned int plat_get_syscnt_freq2(void)
{
return PLAT_SYSCNT_FREQ;
}
#define CLK_ENABLE BIT_32(0)
#define CLK_OFF BIT_32(31)
#define GPIO_BLSP_UART2_TX 4
#define GPIO_BLSP_UART2_RX 5
#define GPIO_CFG_FUNC_BLSP_UART2 (U(0x2) << 2)
#define GPIO_CFG_DRV_STRENGTH_16MA (U(0x7) << 6)
#define GCC_BLSP1_AHB_CBCR (GCC_BASE + 0x01008)
#define GCC_BLSP1_UART2_APPS_CBCR (GCC_BASE + 0x0302c)
#define GCC_APCS_CLOCK_BRANCH_ENA_VOTE (GCC_BASE + 0x45004)
#define BLSP1_AHB_CLK_ENA BIT_32(10)
/*
* The previous boot stage seems to disable most of the UART setup before exit
* so it must be enabled here again before the UART console can be used.
*/
static void msm8916_enable_blsp_uart2(void)
{
/* Route GPIOs to BLSP UART2 */
mmio_write_32(TLMM_GPIO_CFG(GPIO_BLSP_UART2_TX),
GPIO_CFG_FUNC_BLSP_UART2 | GPIO_CFG_DRV_STRENGTH_16MA);
mmio_write_32(TLMM_GPIO_CFG(GPIO_BLSP_UART2_RX),
GPIO_CFG_FUNC_BLSP_UART2 | GPIO_CFG_DRV_STRENGTH_16MA);
/* Enable AHB clock */
mmio_setbits_32(GCC_APCS_CLOCK_BRANCH_ENA_VOTE, BLSP1_AHB_CLK_ENA);
while (mmio_read_32(GCC_BLSP1_AHB_CBCR) & CLK_OFF)
;
/* Enable BLSP UART2 clock */
mmio_setbits_32(GCC_BLSP1_UART2_APPS_CBCR, CLK_ENABLE);
while (mmio_read_32(GCC_BLSP1_UART2_APPS_CBCR) & CLK_OFF)
;
}
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 early as possible */
msm8916_enable_blsp_uart2();
console_uartdm_register(&console, BLSP_UART2_BASE);
}
void bl31_plat_arch_setup(void)
{
mmap_add_region(BL31_BASE, BL31_BASE, BL31_END - BL31_BASE,
MT_RW_DATA | MT_SECURE);
mmap_add_region(BL_CODE_BASE, BL_CODE_BASE,
BL_CODE_END - BL_CODE_BASE,
MT_CODE | MT_SECURE);
mmap_add_region(BL_RO_DATA_BASE, BL_RO_DATA_BASE,
BL_RO_DATA_END - BL_RO_DATA_BASE,
MT_RO_DATA | MT_SECURE);
mmap_add_region(BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_BASE,
BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE,
MT_DEVICE | MT_RW | MT_SECURE | MT_EXECUTE_NEVER);
mmap_add(msm8916_mmap);
init_xlat_tables();
enable_mmu_el3(0);
}
static void msm8916_configure_timer(void)
{
/* Set timer frequency */
mmio_write_32(APCS_QTMR + CNTCTLBASE_CNTFRQ, plat_get_syscnt_freq2());
/* Make all timer frames available to non-secure world */
mmio_write_32(APCS_QTMR + CNTNSAR, GENMASK_32(7, 0));
}
/*
* The APCS register regions always start with a SECURE register that should
* be cleared to 0 to only allow secure access. Since BL31 handles most of
* the CPU power management, most of them can be cleared to secure access only.
*/
#define APCS_GLB_SECURE_STS_NS BIT_32(0)
#define APCS_GLB_SECURE_PWR_NS BIT_32(1)
#define APCS_BOOT_START_ADDR_SEC (APCS_CFG + 0x04)
#define REMAP_EN BIT_32(0)
#define APCS_AA64NAA32_REG (APCS_CFG + 0x0c)
static void msm8916_configure_cpu_pm(void)
{
unsigned int cpu;
/* Disallow non-secure access to boot remapper / TCM registers */
mmio_write_32(APCS_CFG, 0);
/*
* Disallow non-secure access to power management registers.
* However, allow STS and PWR since those also seem to control access
* to CPU frequency related registers (e.g. APCS_CMD_RCGR). If these
* bits are not set, CPU frequency control fails in the non-secure world.
*/
mmio_write_32(APCS_GLB, APCS_GLB_SECURE_STS_NS | APCS_GLB_SECURE_PWR_NS);
/* Disallow non-secure access to L2 SAW2 */
mmio_write_32(APCS_L2_SAW2, 0);
/* Disallow non-secure access to CPU ACS and SAW2 */
for (cpu = 0; cpu < PLATFORM_CORE_COUNT; cpu++) {
mmio_write_32(APCS_ALIAS_ACS(cpu), 0);
mmio_write_32(APCS_ALIAS_SAW2(cpu), 0);
}
/* Make sure all further warm boots end up in BL31 and aarch64 state */
CASSERT((BL31_BASE & 0xffff) == 0, assert_bl31_base_64k_aligned);
mmio_write_32(APCS_BOOT_START_ADDR_SEC, BL31_BASE | REMAP_EN);
mmio_write_32(APCS_AA64NAA32_REG, 1);
}
/*
* MSM8916 has a special "interrupt aggregation logic" in the APPS SMMU,
* which allows routing context bank interrupts to one of 3 interrupt numbers
* ("TZ/HYP/NS"). Route all interrupts to the non-secure interrupt number
* by default to avoid special setup on the non-secure side.
*/
#define GCC_SMMU_CFG_CBCR (GCC_BASE + 0x12038)
#define GCC_APCS_SMMU_CLOCK_BRANCH_ENA_VOTE (GCC_BASE + 0x4500c)
#define SMMU_CFG_CLK_ENA BIT_32(12)
#define APPS_SMMU_INTR_SEL_NS (APPS_SMMU_QCOM + 0x2000)
#define APPS_SMMU_INTR_SEL_NS_EN_ALL U(0xffffffff)
static void msm8916_configure_smmu(void)
{
/* Enable SMMU configuration clock to enable register access */
mmio_setbits_32(GCC_APCS_SMMU_CLOCK_BRANCH_ENA_VOTE, SMMU_CFG_CLK_ENA);
while (mmio_read_32(GCC_SMMU_CFG_CBCR) & CLK_OFF)
;
/* Route all context bank interrupts to non-secure interrupt */
mmio_write_32(APPS_SMMU_INTR_SEL_NS, APPS_SMMU_INTR_SEL_NS_EN_ALL);
/* Disable configuration clock again */
mmio_clrbits_32(GCC_APCS_SMMU_CLOCK_BRANCH_ENA_VOTE, SMMU_CFG_CLK_ENA);
}
void bl31_platform_setup(void)
{
INFO("BL31: Platform setup start\n");
generic_delay_timer_init();
msm8916_configure_timer();
msm8916_gicv2_init();
msm8916_configure_cpu_pm();
msm8916_configure_smmu();
INFO("BL31: Platform setup done\n");
}
entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
{
switch (type) {
case SECURE:
return &image_ep_info.bl32;
case NON_SECURE:
return &image_ep_info.bl33;
default:
assert(sec_state_is_valid(type));
return NULL;
}
}