+++ /dev/null
-/*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <arch_helpers.h>
-#include <assert.h>
-#include <bl_common.h>
-#include <debug.h>
-#include <interrupt_mgmt.h>
-#include <platform.h>
-#include <stdint.h>
-#include <tegra_def.h>
-#include <tegra_private.h>
-
-/* Value used to initialize Non-Secure IRQ priorities four at a time */
-#define GICD_IPRIORITYR_DEF_VAL \
- (GIC_HIGHEST_NS_PRIORITY | \
- (GIC_HIGHEST_NS_PRIORITY << 8) | \
- (GIC_HIGHEST_NS_PRIORITY << 16) | \
- (GIC_HIGHEST_NS_PRIORITY << 24))
-
-static const irq_sec_cfg_t *g_irq_sec_ptr;
-static uint32_t g_num_irqs;
-
-/*******************************************************************************
- * Place the cpu interface in a state where it can never make a cpu exit wfi as
- * as result of an asserted interrupt. This is critical for powering down a cpu
- ******************************************************************************/
-void tegra_gic_cpuif_deactivate(void)
-{
- uint32_t val;
-
- /* Disable secure, non-secure interrupts and disable their bypass */
- val = gicc_read_ctlr(TEGRA_GICC_BASE);
- val &= ~(ENABLE_GRP0 | ENABLE_GRP1);
- val |= FIQ_BYP_DIS_GRP1 | FIQ_BYP_DIS_GRP0;
- val |= IRQ_BYP_DIS_GRP0 | IRQ_BYP_DIS_GRP1;
- gicc_write_ctlr(TEGRA_GICC_BASE, val);
-}
-
-/*******************************************************************************
- * Enable secure interrupts and set the priority mask register to allow all
- * interrupts to trickle in.
- ******************************************************************************/
-static void tegra_gic_cpuif_setup(uint32_t gicc_base)
-{
- uint32_t val;
-
- val = ENABLE_GRP0 | ENABLE_GRP1 | FIQ_EN | FIQ_BYP_DIS_GRP0;
- val |= IRQ_BYP_DIS_GRP0 | FIQ_BYP_DIS_GRP1 | IRQ_BYP_DIS_GRP1;
-
- gicc_write_ctlr(gicc_base, val);
- gicc_write_pmr(gicc_base, GIC_PRI_MASK);
-}
-
-/*******************************************************************************
- * Per cpu gic distributor setup which will be done by all cpus after a cold
- * boot/hotplug. This marks out the secure interrupts & enables them.
- ******************************************************************************/
-static void tegra_gic_pcpu_distif_setup(uint32_t gicd_base)
-{
- uint32_t index, sec_ppi_sgi_mask = 0;
-
- assert(gicd_base != 0U);
-
- /* Setup PPI priorities doing four at a time */
- for (index = 0U; index < 32U; index += 4U) {
- gicd_write_ipriorityr(gicd_base, index,
- GICD_IPRIORITYR_DEF_VAL);
- }
-
- /*
- * Invert the bitmask to create a mask for non-secure PPIs and
- * SGIs. Program the GICD_IGROUPR0 with this bit mask. This write will
- * update the GICR_IGROUPR0 as well in case we are running on a GICv3
- * system. This is critical if GICD_CTLR.ARE_NS=1.
- */
- gicd_write_igroupr(gicd_base, 0, ~sec_ppi_sgi_mask);
-}
-
-/*******************************************************************************
- * Global gic distributor setup which will be done by the primary cpu after a
- * cold boot. It marks out the non secure SPIs, PPIs & SGIs and enables them.
- * It then enables the secure GIC distributor interface.
- ******************************************************************************/
-static void tegra_gic_distif_setup(uint32_t gicd_base)
-{
- uint32_t index, num_ints, irq_num;
- uint8_t target_cpus;
- uint32_t val;
-
- /*
- * Mark out non-secure interrupts. Calculate number of
- * IGROUPR registers to consider. Will be equal to the
- * number of IT_LINES
- */
- num_ints = gicd_read_typer(gicd_base) & IT_LINES_NO_MASK;
- num_ints = (num_ints + 1U) << 5;
- for (index = MIN_SPI_ID; index < num_ints; index += 32U) {
- gicd_write_igroupr(gicd_base, index, 0xFFFFFFFFU);
- }
-
- /* Setup SPI priorities doing four at a time */
- for (index = MIN_SPI_ID; index < num_ints; index += 4U) {
- gicd_write_ipriorityr(gicd_base, index,
- GICD_IPRIORITYR_DEF_VAL);
- }
-
- /* Configure SPI secure interrupts now */
- if (g_irq_sec_ptr != NULL) {
-
- for (index = 0U; index < g_num_irqs; index++) {
- irq_num = g_irq_sec_ptr[index].irq;
- target_cpus = (uint8_t)g_irq_sec_ptr[index].target_cpus;
-
- if (irq_num >= MIN_SPI_ID) {
-
- /* Configure as a secure interrupt */
- gicd_clr_igroupr(gicd_base, irq_num);
-
- /* Configure SPI priority */
- mmio_write_8((uint64_t)gicd_base +
- (uint64_t)GICD_IPRIORITYR +
- (uint64_t)irq_num,
- GIC_HIGHEST_SEC_PRIORITY &
- GIC_PRI_MASK);
-
- /* Configure as level triggered */
- val = gicd_read_icfgr(gicd_base, irq_num);
- val |= (3U << ((irq_num & 0xFU) << 1U));
- gicd_write_icfgr(gicd_base, irq_num, val);
-
- /* Route SPI to the target CPUs */
- gicd_set_itargetsr(gicd_base, irq_num,
- target_cpus);
-
- /* Enable this interrupt */
- gicd_set_isenabler(gicd_base, irq_num);
- }
- }
- }
-
- /*
- * Configure the SGI and PPI. This is done in a separated function
- * because each CPU is responsible for initializing its own private
- * interrupts.
- */
- tegra_gic_pcpu_distif_setup(gicd_base);
-
- /* enable distributor */
- gicd_write_ctlr(gicd_base, ENABLE_GRP0 | ENABLE_GRP1);
-}
-
-void tegra_gic_setup(const irq_sec_cfg_t *irq_sec_ptr, uint32_t num_irqs)
-{
- g_irq_sec_ptr = irq_sec_ptr;
- g_num_irqs = num_irqs;
-
- tegra_gic_cpuif_setup(TEGRA_GICC_BASE);
- tegra_gic_distif_setup(TEGRA_GICD_BASE);
-}
-
-/*******************************************************************************
- * An ARM processor signals interrupt exceptions through the IRQ and FIQ pins.
- * The interrupt controller knows which pin/line it uses to signal a type of
- * interrupt. This function provides a common implementation of
- * plat_interrupt_type_to_line() in an ARM GIC environment for optional re-use
- * across platforms. It lets the interrupt management framework determine
- * for a type of interrupt and security state, which line should be used in the
- * SCR_EL3 to control its routing to EL3. The interrupt line is represented as
- * the bit position of the IRQ or FIQ bit in the SCR_EL3.
- ******************************************************************************/
-static uint32_t tegra_gic_interrupt_type_to_line(uint32_t type,
- uint32_t security_state)
-{
- assert((type == INTR_TYPE_S_EL1) ||
- (type == INTR_TYPE_EL3) ||
- (type == INTR_TYPE_NS));
-
- assert(sec_state_is_valid(security_state));
-
- /*
- * We ignore the security state parameter under the assumption that
- * both normal and secure worlds are using ARM GICv2. This parameter
- * will be used when the secure world starts using GICv3.
- */
- return gicv2_interrupt_type_to_line(TEGRA_GICC_BASE, type);
-}
-
-/*******************************************************************************
- * This function returns the type of the highest priority pending interrupt at
- * the GIC cpu interface. INTR_TYPE_INVAL is returned when there is no
- * interrupt pending.
- ******************************************************************************/
-static uint32_t tegra_gic_get_pending_interrupt_type(void)
-{
- uint32_t id;
- uint32_t index;
- uint32_t ret = INTR_TYPE_NS;
-
- id = gicc_read_hppir(TEGRA_GICC_BASE) & INT_ID_MASK;
-
- /* get the interrupt type */
- if (id < 1022U) {
- for (index = 0U; index < g_num_irqs; index++) {
- if (id == g_irq_sec_ptr[index].irq) {
- ret = g_irq_sec_ptr[index].type;
- break;
- }
- }
- } else {
- if (id == GIC_SPURIOUS_INTERRUPT) {
- ret = INTR_TYPE_INVAL;
- }
- }
-
- return ret;
-}
-
-/*******************************************************************************
- * This function returns the id of the highest priority pending interrupt at
- * the GIC cpu interface. INTR_ID_UNAVAILABLE is returned when there is no
- * interrupt pending.
- ******************************************************************************/
-static uint32_t tegra_gic_get_pending_interrupt_id(void)
-{
- uint32_t id, ret;
-
- id = gicc_read_hppir(TEGRA_GICC_BASE) & INT_ID_MASK;
-
- if (id < 1022U) {
- ret = id;
- } else if (id == 1023U) {
- ret = 0xFFFFFFFFU; /* INTR_ID_UNAVAILABLE */
- } else {
- /*
- * Find out which non-secure interrupt it is under the assumption that
- * the GICC_CTLR.AckCtl bit is 0.
- */
- ret = gicc_read_ahppir(TEGRA_GICC_BASE) & INT_ID_MASK;
- }
-
- return ret;
-}
-
-/*******************************************************************************
- * This functions reads the GIC cpu interface Interrupt Acknowledge register
- * to start handling the pending interrupt. It returns the contents of the IAR.
- ******************************************************************************/
-static uint32_t tegra_gic_acknowledge_interrupt(void)
-{
- return gicc_read_IAR(TEGRA_GICC_BASE);
-}
-
-/*******************************************************************************
- * This functions writes the GIC cpu interface End Of Interrupt register with
- * the passed value to finish handling the active interrupt
- ******************************************************************************/
-static void tegra_gic_end_of_interrupt(uint32_t id)
-{
- gicc_write_EOIR(TEGRA_GICC_BASE, id);
-}
-
-/*******************************************************************************
- * This function returns the type of the interrupt id depending upon the group
- * this interrupt has been configured under by the interrupt controller i.e.
- * group0 or group1.
- ******************************************************************************/
-static uint32_t tegra_gic_get_interrupt_type(uint32_t id)
-{
- uint32_t group;
- uint32_t index;
- uint32_t ret = INTR_TYPE_NS;
-
- group = gicd_get_igroupr(TEGRA_GICD_BASE, id);
-
- /* get the interrupt type */
- if (group == GRP0) {
- for (index = 0U; index < g_num_irqs; index++) {
- if (id == g_irq_sec_ptr[index].irq) {
- ret = g_irq_sec_ptr[index].type;
- break;
- }
- }
- }
-
- return ret;
-}
-
-uint32_t plat_ic_get_pending_interrupt_id(void)
-{
- return tegra_gic_get_pending_interrupt_id();
-}
-
-uint32_t plat_ic_get_pending_interrupt_type(void)
-{
- return tegra_gic_get_pending_interrupt_type();
-}
-
-uint32_t plat_ic_acknowledge_interrupt(void)
-{
- return tegra_gic_acknowledge_interrupt();
-}
-
-uint32_t plat_ic_get_interrupt_type(uint32_t id)
-{
- return tegra_gic_get_interrupt_type(id);
-}
-
-void plat_ic_end_of_interrupt(uint32_t id)
-{
- tegra_gic_end_of_interrupt(id);
-}
-
-uint32_t plat_interrupt_type_to_line(uint32_t type,
- uint32_t security_state)
-{
- return tegra_gic_interrupt_type_to_line(type, security_state);
-}
projects / project / bcm63xx / atf.git / commitdiff