diff options
| -rw-r--r-- | platform/fpga/openpiton/platform.c | 82 |
1 files changed, 57 insertions, 25 deletions
diff --git a/platform/fpga/openpiton/platform.c b/platform/fpga/openpiton/platform.c index 96c2d57..4c83f6d 100644 --- a/platform/fpga/openpiton/platform.c +++ b/platform/fpga/openpiton/platform.c @@ -16,15 +16,15 @@ #include <sbi_utils/serial/uart8250.h> #include <sbi_utils/sys/clint.h> -#define OPENPITON_UART_ADDR 0xfff0c2c000 -#define OPENPITON_UART_FREQ 60000000 -#define OPENPITON_UART_BAUDRATE 115200 -#define OPENPITON_UART_REG_SHIFT 0 -#define OPENPITON_UART_REG_WIDTH 1 -#define OPENPITON_PLIC_ADDR 0xfff1100000 -#define OPENPITON_PLIC_NUM_SOURCES 2 -#define OPENPITON_HART_COUNT 3 -#define OPENPITON_CLINT_ADDR 0xfff1020000 +#define OPENPITON_DEFAULT_UART_ADDR 0xfff0c2c000 +#define OPENPITON_DEFAULT_UART_FREQ 60000000 +#define OPENPITON_DEFAULT_UART_BAUDRATE 115200 +#define OPENPITON_DEFAULT_UART_REG_SHIFT 0 +#define OPENPITON_DEFAULT_UART_REG_WIDTH 1 +#define OPENPITON_DEFAULT_PLIC_ADDR 0xfff1100000 +#define OPENPITON_DEFAULT_PLIC_NUM_SOURCES 2 +#define OPENPITON_DEFAULT_HART_COUNT 3 +#define OPENPITON_DEFAULT_CLINT_ADDR 0xfff1020000 #define SBI_OPENPITON_FEATURES \ (SBI_PLATFORM_HAS_TIMER_VALUE | \ @@ -32,12 +32,44 @@ SBI_PLATFORM_HAS_MCOUNTEREN | \ SBI_PLATFORM_HAS_MFAULTS_DELEGATION) +static struct platform_uart_data uart = { + OPENPITON_DEFAULT_UART_ADDR, + OPENPITON_DEFAULT_UART_FREQ, + OPENPITON_DEFAULT_UART_BAUDRATE, + }; +static struct platform_plic_data plic = { + OPENPITON_DEFAULT_PLIC_ADDR, + OPENPITON_DEFAULT_PLIC_NUM_SOURCES, + }; +static unsigned long clint_addr = OPENPITON_DEFAULT_CLINT_ADDR; + /* * OpenPiton platform early initialization. */ static int openpiton_early_init(bool cold_boot) { - /* For now nothing to do. */ + void *fdt; + struct platform_uart_data uart_data; + struct platform_plic_data plic_data; + unsigned long clint_data; + int rc; + + if (!cold_boot) + return 0; + fdt = sbi_scratch_thishart_arg1_ptr(); + + rc = fdt_parse_uart8250(fdt, &uart_data, "ns16550"); + if (!rc) + uart = uart_data; + + rc = fdt_parse_plic(fdt, &plic_data, "riscv,plic0"); + if (!rc) + plic = plic_data; + + rc = fdt_parse_clint(fdt, &clint_data, "riscv,clint0"); + if (!rc) + clint_addr = clint_data; + return 0; } @@ -62,19 +94,19 @@ static int openpiton_final_init(bool cold_boot) */ static int openpiton_console_init(void) { - return uart8250_init(OPENPITON_UART_ADDR, - OPENPITON_UART_FREQ, - OPENPITON_UART_BAUDRATE, - OPENPITON_UART_REG_SHIFT, - OPENPITON_UART_REG_WIDTH); + return uart8250_init(uart.addr, + uart.freq, + uart.baud, + OPENPITON_DEFAULT_UART_REG_SHIFT, + OPENPITON_DEFAULT_UART_REG_WIDTH); } static int plic_openpiton_warm_irqchip_init(u32 target_hart, int m_cntx_id, int s_cntx_id) { - size_t i, ie_words = OPENPITON_PLIC_NUM_SOURCES / 32 + 1; + size_t i, ie_words = plic.num_src / 32 + 1; - if (target_hart >= OPENPITON_HART_COUNT) + if (target_hart >= OPENPITON_DEFAULT_HART_COUNT) return -1; /* By default, enable all IRQs for M-mode of target HART */ if (m_cntx_id > -1) { @@ -105,9 +137,9 @@ static int openpiton_irqchip_init(bool cold_boot) int ret; if (cold_boot) { - ret = plic_cold_irqchip_init(OPENPITON_PLIC_ADDR, - OPENPITON_PLIC_NUM_SOURCES, - OPENPITON_HART_COUNT); + ret = plic_cold_irqchip_init(plic.addr, + plic.num_src, + OPENPITON_DEFAULT_HART_COUNT); if (ret) return ret; } @@ -123,8 +155,8 @@ static int openpiton_ipi_init(bool cold_boot) int ret; if (cold_boot) { - ret = clint_cold_ipi_init(OPENPITON_CLINT_ADDR, - OPENPITON_HART_COUNT); + ret = clint_cold_ipi_init(clint_addr, + OPENPITON_DEFAULT_HART_COUNT); if (ret) return ret; } @@ -140,8 +172,8 @@ static int openpiton_timer_init(bool cold_boot) int ret; if (cold_boot) { - ret = clint_cold_timer_init(OPENPITON_CLINT_ADDR, - OPENPITON_HART_COUNT, TRUE); + ret = clint_cold_timer_init(clint_addr, + OPENPITON_DEFAULT_HART_COUNT, TRUE); if (ret) return ret; } @@ -195,7 +227,7 @@ const struct sbi_platform platform = { .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01), .name = "OPENPITON RISC-V", .features = SBI_OPENPITON_FEATURES, - .hart_count = OPENPITON_HART_COUNT, + .hart_count = OPENPITON_DEFAULT_HART_COUNT, .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE, .platform_ops_addr = (unsigned long)&platform_ops }; |