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lib: utils: Allow CLINT functions to be used for multiple CLINTs

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We extend CLINT cold init function to have a "struct clint_data *"
parameter pointing to CLINT details. This allows platforms to use
CLINT functions for multiple CLINT instances.

When multiple CLINTs are present, the platform can also provide
one of the CLINT as reference CLINT for other CLINTs. This will
help CLINTs to sync their time value with reference CLINT using
a time_delta computed in warm init function.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-05-12 18:38:31 +05:30
committed by Anup Patel
parent d30bb68448
commit a9a9751185
11 changed files with 202 additions and 87 deletions
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20
platform/fpga/openpiton/platform.c
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@@ -35,7 +35,13 @@ static struct plic_data plic = {
.addr = OPENPITON_DEFAULT_PLIC_ADDR,
.num_src = OPENPITON_DEFAULT_PLIC_NUM_SOURCES,
};
static unsigned long clint_addr = OPENPITON_DEFAULT_CLINT_ADDR;
static struct clint_data clint = {
.addr = OPENPITON_DEFAULT_CLINT_ADDR,
.first_hartid = 0,
.hart_count = OPENPITON_DEFAULT_HART_COUNT,
.has_64bit_mmio = TRUE,
};
/*
* OpenPiton platform early initialization.
@@ -45,7 +51,7 @@ static int openpiton_early_init(bool cold_boot)
void *fdt;
struct platform_uart_data uart_data;
struct plic_data plic_data;
unsigned long clint_data;
unsigned long clint_addr;
int rc;
if (!cold_boot)
@@ -60,9 +66,9 @@ static int openpiton_early_init(bool cold_boot)
if (!rc)
plic = plic_data;
rc = fdt_parse_compat_addr(fdt, &clint_data, "riscv,clint0");
rc = fdt_parse_compat_addr(fdt, &clint_addr, "riscv,clint0");
if (!rc)
clint_addr = clint_data;
clint.addr = clint_addr;
return 0;
}
@@ -143,8 +149,7 @@ static int openpiton_ipi_init(bool cold_boot)
int ret;
if (cold_boot) {
ret = clint_cold_ipi_init(clint_addr,
OPENPITON_DEFAULT_HART_COUNT);
ret = clint_cold_ipi_init(&clint);
if (ret)
return ret;
}
@@ -160,8 +165,7 @@ static int openpiton_timer_init(bool cold_boot)
int ret;
if (cold_boot) {
ret = clint_cold_timer_init(clint_addr,
OPENPITON_DEFAULT_HART_COUNT, TRUE);
ret = clint_cold_timer_init(&clint, NULL);
if (ret)
return ret;
}