From 0feb4a7129eb4f120c75849ddc9e50495c50cb63 Mon Sep 17 00:00:00 2001 From: Alistair Francis Date: Thu, 4 Apr 2019 18:15:23 +0000 Subject: [PATCH] riscv: plic: Fix incorrect irq calculation This patch fixes four different things, to maintain bisectability they have been merged into a single patch. The following fixes are below: sifive_plic: Fix incorrect irq calculation The irq is incorrectly calculated to be off by one. It has worked in the past as the priority_base offset has also been set incorrectly. We are about to fix the priority_base offset so first first the irq calculation. sifive_u: Fix PLIC priority base offset and numbering According to the FU540 manual the PLIC source priority address starts at an offset of 0x04 and not 0x00. The same manual also specifies that the PLIC only has 53 source priorities. Fix these two incorrect header files. We also need to over extend the plic_gpios[] array as the PLIC sources count from 1 and not 0. riscv: sifive_e: Fix PLIC priority base offset According to the FE31 manual the PLIC source priority address starts at an offset of 0x04 and not 0x00. riscv: virt: Fix PLIC priority base offset Update the virt offsets based on the newly updated SiFive U and SiFive E offsets. Signed-off-by: Alistair Francis Signed-off-by: Palmer Dabbelt --- hw/riscv/sifive_plic.c | 4 ++-- include/hw/riscv/sifive_e.h | 2 +- include/hw/riscv/sifive_u.h | 4 ++-- include/hw/riscv/virt.h | 2 +- 4 files changed, 6 insertions(+), 6 deletions(-) diff --git a/hw/riscv/sifive_plic.c b/hw/riscv/sifive_plic.c index ac768e6c27..0315e035e5 100644 --- a/hw/riscv/sifive_plic.c +++ b/hw/riscv/sifive_plic.c @@ -207,7 +207,7 @@ static uint64_t sifive_plic_read(void *opaque, hwaddr addr, unsigned size) if (addr >= plic->priority_base && /* 4 bytes per source */ addr < plic->priority_base + (plic->num_sources << 2)) { - uint32_t irq = (addr - plic->priority_base) >> 2; + uint32_t irq = ((addr - plic->priority_base) >> 2) + 1; if (RISCV_DEBUG_PLIC) { qemu_log("plic: read priority: irq=%d priority=%d\n", irq, plic->source_priority[irq]); @@ -280,7 +280,7 @@ static void sifive_plic_write(void *opaque, hwaddr addr, uint64_t value, if (addr >= plic->priority_base && /* 4 bytes per source */ addr < plic->priority_base + (plic->num_sources << 2)) { - uint32_t irq = (addr - plic->priority_base) >> 2; + uint32_t irq = ((addr - plic->priority_base) >> 2) + 1; plic->source_priority[irq] = value & 7; if (RISCV_DEBUG_PLIC) { qemu_log("plic: write priority: irq=%d priority=%d\n", diff --git a/include/hw/riscv/sifive_e.h b/include/hw/riscv/sifive_e.h index 7b6d8aed96..f715f8606f 100644 --- a/include/hw/riscv/sifive_e.h +++ b/include/hw/riscv/sifive_e.h @@ -70,7 +70,7 @@ enum { #define SIFIVE_E_PLIC_HART_CONFIG "M" #define SIFIVE_E_PLIC_NUM_SOURCES 127 #define SIFIVE_E_PLIC_NUM_PRIORITIES 7 -#define SIFIVE_E_PLIC_PRIORITY_BASE 0x0 +#define SIFIVE_E_PLIC_PRIORITY_BASE 0x04 #define SIFIVE_E_PLIC_PENDING_BASE 0x1000 #define SIFIVE_E_PLIC_ENABLE_BASE 0x2000 #define SIFIVE_E_PLIC_ENABLE_STRIDE 0x80 diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h index be13cc1304..892f0eee21 100644 --- a/include/hw/riscv/sifive_u.h +++ b/include/hw/riscv/sifive_u.h @@ -68,9 +68,9 @@ enum { }; #define SIFIVE_U_PLIC_HART_CONFIG "MS" -#define SIFIVE_U_PLIC_NUM_SOURCES 127 +#define SIFIVE_U_PLIC_NUM_SOURCES 54 #define SIFIVE_U_PLIC_NUM_PRIORITIES 7 -#define SIFIVE_U_PLIC_PRIORITY_BASE 0x0 +#define SIFIVE_U_PLIC_PRIORITY_BASE 0x04 #define SIFIVE_U_PLIC_PENDING_BASE 0x1000 #define SIFIVE_U_PLIC_ENABLE_BASE 0x2000 #define SIFIVE_U_PLIC_ENABLE_STRIDE 0x80 diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h index f12deaebd6..568764b570 100644 --- a/include/hw/riscv/virt.h +++ b/include/hw/riscv/virt.h @@ -59,7 +59,7 @@ enum { #define VIRT_PLIC_HART_CONFIG "MS" #define VIRT_PLIC_NUM_SOURCES 127 #define VIRT_PLIC_NUM_PRIORITIES 7 -#define VIRT_PLIC_PRIORITY_BASE 0x0 +#define VIRT_PLIC_PRIORITY_BASE 0x04 #define VIRT_PLIC_PENDING_BASE 0x1000 #define VIRT_PLIC_ENABLE_BASE 0x2000 #define VIRT_PLIC_ENABLE_STRIDE 0x80