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lib: utils/irqchip: Add FDT based driver for IMSIC

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We add simple FDT irqchip driver for IMSIC so that generic platform
(and other FDT based platforms) can utilize common IMIC library.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
2021-04-21 15:27:29 +05:30
committed by Anup Patel
parent 9f73669959
commit 811da5c541
6 changed files with 230 additions and 0 deletions
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12
platform/generic/platform.c
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@@ -18,6 +18,7 @@
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/fdt/fdt_pmu.h>
#include <sbi_utils/irqchip/fdt_irqchip.h>
#include <sbi_utils/irqchip/imsic.h>
#include <sbi_utils/serial/fdt_serial.h>
#include <sbi_utils/timer/fdt_timer.h>
#include <sbi_utils/ipi/fdt_ipi.h>
@@ -56,6 +57,7 @@ static void fw_platform_lookup_special(void *fdt, int root_offset)
}
extern struct sbi_platform platform;
static bool platform_has_mlevel_imsic = false;
static u32 generic_hart_index2id[SBI_HARTMASK_MAX_BITS] = { 0 };
/*
@@ -110,6 +112,8 @@ unsigned long fw_platform_init(unsigned long arg0, unsigned long arg1,
platform.hart_count = hart_count;
platform_has_mlevel_imsic = fdt_check_imsic_mlevel(fdt);
/* Return original FDT pointer */
return arg1;
@@ -118,6 +122,13 @@ fail:
wfi();
}
static int generic_nascent_init(void)
{
if (platform_has_mlevel_imsic)
imsic_local_irqchip_init();
return 0;
}
static int generic_early_init(bool cold_boot)
{
if (!generic_plat || !generic_plat->early_init)
@@ -210,6 +221,7 @@ static uint64_t generic_pmu_xlate_to_mhpmevent(uint32_t event_idx,
}
const struct sbi_platform_operations platform_ops = {
.nascent_init = generic_nascent_init,
.early_init = generic_early_init,
.final_init = generic_final_init,
.early_exit = generic_early_exit,