blob: 5015610c0eefef61e22cf61359aeccd6608769ce [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 <lib/mmio.h>
#include "msm8916_config.h"
#include "msm8916_gicv2.h"
#include <msm8916_mmap.h>
#include <platform_def.h>
static void msm8916_configure_timer(void)
{
/* Set timer frequency */
mmio_write_32(APCS_QTMR + CNTCTLBASE_CNTFRQ, PLAT_SYSCNT_FREQ);
/* 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 CLK_OFF BIT_32(31)
#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 msm8916_configure(void)
{
msm8916_gicv2_configure();
msm8916_configure_timer();
msm8916_configure_cpu_pm();
msm8916_configure_smmu();
}