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@@ -4,6 +4,8 @@
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*/
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#include <common.h>
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#include <dm.h>
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+#include <regmap.h>
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+#include <syscon.h>
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#include <asm/gic.h>
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#include <asm/gic-v3.h>
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#include <asm/io.h>
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@@ -16,15 +18,22 @@ static u32 lpi_id_bits;
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#define LPI_PROPBASE_SZ ALIGN(BIT(LPI_NRBITS), SZ_64K)
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#define LPI_PENDBASE_SZ ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K)
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+/* Number of GIC re-distributors */
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+#define MAX_GIC_REDISTRIBUTORS 8
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+
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/*
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* gic_v3_its_priv - gic details
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*
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* @gicd_base: gicd base address
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* @gicr_base: gicr base address
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+ * @lpi_base: gic lpi base address
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+ * @num_redist: number of gic re-distributors
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*/
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struct gic_v3_its_priv {
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ulong gicd_base;
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ulong gicr_base;
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+ ulong lpi_base;
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+ u32 num_redist;
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};
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static int gic_v3_its_get_gic_addr(struct gic_v3_its_priv *priv)
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@@ -58,13 +67,39 @@ static int gic_v3_its_get_gic_addr(struct gic_v3_its_priv *priv)
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return 0;
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}
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+static int gic_v3_its_get_gic_lpi_addr(struct gic_v3_its_priv *priv)
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+{
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+ struct regmap *regmap;
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+ struct udevice *dev;
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+ int ret;
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+
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+ ret = uclass_get_device_by_driver(UCLASS_SYSCON,
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+ DM_GET_DRIVER(gic_lpi_syscon), &dev);
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+ if (ret) {
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+ pr_err("%s: failed to get %s syscon device\n", __func__,
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+ DM_GET_DRIVER(gic_lpi_syscon)->name);
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+ return ret;
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+ }
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+
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+ regmap = syscon_get_regmap(dev);
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+ if (!regmap) {
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+ pr_err("%s: failed to regmap for %s syscon device\n", __func__,
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+ DM_GET_DRIVER(gic_lpi_syscon)->name);
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+ return -ENODEV;
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+ }
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+ priv->lpi_base = regmap->ranges[0].start;
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+
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+ priv->num_redist = dev_read_u32_default(dev, "max-gic-redistributors",
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+ MAX_GIC_REDISTRIBUTORS);
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+
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+ return 0;
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+}
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+
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/*
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* Program the GIC LPI configuration tables for all
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* the re-distributors and enable the LPI table
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- * base: Configuration table address
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- * num_redist: number of redistributors
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*/
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-int gic_lpi_tables_init(u64 base, u32 num_redist)
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+int gic_lpi_tables_init(void)
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{
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struct gic_v3_its_priv priv;
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u32 gicd_typer;
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@@ -77,6 +112,9 @@ int gic_lpi_tables_init(u64 base, u32 num_redist)
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if (gic_v3_its_get_gic_addr(&priv))
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return -EINVAL;
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+ if (gic_v3_its_get_gic_lpi_addr(&priv))
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+ return -EINVAL;
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+
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gicd_typer = readl((uintptr_t)(priv.gicd_base + GICD_TYPER));
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/* GIC support for Locality specific peripheral interrupts (LPI's) */
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if (!(gicd_typer & GICD_TYPER_LPIS)) {
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@@ -89,7 +127,7 @@ int gic_lpi_tables_init(u64 base, u32 num_redist)
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* Once the LPI table is enabled, can not program the
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* LPI configuration tables again, unless the GIC is reset.
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*/
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- for (i = 0; i < num_redist; i++) {
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+ for (i = 0; i < priv.num_redist; i++) {
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u32 offset = i * GIC_REDISTRIBUTOR_OFFSET;
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if ((readl((uintptr_t)(priv.gicr_base + offset))) &
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@@ -105,7 +143,7 @@ int gic_lpi_tables_init(u64 base, u32 num_redist)
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ITS_MAX_LPI_NRBITS);
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/* Set PropBase */
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- val = (base |
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+ val = (priv.lpi_base |
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GICR_PROPBASER_INNERSHAREABLE |
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GICR_PROPBASER_RAWAWB |
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((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK));
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@@ -122,10 +160,10 @@ int gic_lpi_tables_init(u64 base, u32 num_redist)
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}
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}
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- redist_lpi_base = base + LPI_PROPBASE_SZ;
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+ redist_lpi_base = priv.lpi_base + LPI_PROPBASE_SZ;
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pend_base = priv.gicr_base + GICR_PENDBASER;
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- for (i = 0; i < num_redist; i++) {
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+ for (i = 0; i < priv.num_redist; i++) {
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u32 offset = i * GIC_REDISTRIBUTOR_OFFSET;
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val = ((redist_lpi_base + (i * LPI_PENDBASE_SZ)) |
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@@ -159,3 +197,14 @@ U_BOOT_DRIVER(arm_gic_v3_its) = {
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.id = UCLASS_IRQ,
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.of_match = gic_v3_its_ids,
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};
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+
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+static const struct udevice_id gic_lpi_syscon_ids[] = {
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+ { .compatible = "gic-lpi-base" },
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+ {}
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+};
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+
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+U_BOOT_DRIVER(gic_lpi_syscon) = {
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+ .name = "gic-lpi-base",
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+ .id = UCLASS_SYSCON,
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+ .of_match = gic_lpi_syscon_ids,
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+};
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