From: Alistair Francis <alistair.francis@opensource.wdc.com>
To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org
Cc: bmeng.cn@gmail.com, Palmer Dabbelt <palmer@dabbelt.com>,
alistair23@gmail.com, Alistair Francis <alistair.francis@wdc.com>,
Alistair Francis <Alistair.Francis@wdc.com>,
Bin Meng <bin.meng@windriver.com>
Subject: [PATCH v4 2/8] hw/intc: sifive_plic: Cleanup the write function
Date: Thu, 6 Jan 2022 07:39:31 +1000 [thread overview]
Message-ID: <20220105213937.1113508-3-alistair.francis@opensource.wdc.com> (raw)
In-Reply-To: <20220105213937.1113508-1-alistair.francis@opensource.wdc.com>
From: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
hw/intc/sifive_plic.c | 76 +++++++++++++++----------------------------
1 file changed, 27 insertions(+), 49 deletions(-)
diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c
index a9f7a1bfb0..698492ce77 100644
--- a/hw/intc/sifive_plic.c
+++ b/hw/intc/sifive_plic.c
@@ -33,6 +33,11 @@
#define RISCV_DEBUG_PLIC 0
+static bool addr_between(uint32_t addr, uint32_t base, uint32_t num)
+{
+ return addr >= base && addr - base < num;
+}
+
static PLICMode char_to_mode(char c)
{
switch (c) {
@@ -269,80 +274,53 @@ static void sifive_plic_write(void *opaque, hwaddr addr, uint64_t value,
{
SiFivePLICState *plic = opaque;
- /* writes must be 4 byte words */
- if ((addr & 0x3) != 0) {
- goto err;
- }
-
- if (addr >= plic->priority_base && /* 4 bytes per source */
- addr < plic->priority_base + (plic->num_sources << 2))
- {
+ if (addr_between(addr, plic->priority_base, plic->num_sources << 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",
- irq, plic->source_priority[irq]);
- }
sifive_plic_update(plic);
- return;
- } else if (addr >= plic->pending_base && /* 1 bit per source */
- addr < plic->pending_base + (plic->num_sources >> 3))
- {
+ } else if (addr_between(addr, plic->pending_base,
+ plic->num_sources >> 3)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid pending write: 0x%" HWADDR_PRIx "",
__func__, addr);
- return;
- } else if (addr >= plic->enable_base && /* 1 bit per source */
- addr < plic->enable_base + plic->num_addrs * plic->enable_stride)
- {
+ } else if (addr_between(addr, plic->enable_base,
+ plic->num_addrs * plic->enable_stride)) {
uint32_t addrid = (addr - plic->enable_base) / plic->enable_stride;
uint32_t wordid = (addr & (plic->enable_stride - 1)) >> 2;
+
if (wordid < plic->bitfield_words) {
plic->enable[addrid * plic->bitfield_words + wordid] = value;
- if (RISCV_DEBUG_PLIC) {
- qemu_log("plic: write enable: hart%d-%c word=%d value=%x\n",
- plic->addr_config[addrid].hartid,
- mode_to_char(plic->addr_config[addrid].mode), wordid,
- plic->enable[addrid * plic->bitfield_words + wordid]);
- }
- return;
+ } else {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Invalid enable write 0x%" HWADDR_PRIx "\n",
+ __func__, addr);
}
- } else if (addr >= plic->context_base && /* 4 bytes per reg */
- addr < plic->context_base + plic->num_addrs * plic->context_stride)
- {
+ } else if (addr_between(addr, plic->context_base,
+ plic->num_addrs * plic->context_stride)) {
uint32_t addrid = (addr - plic->context_base) / plic->context_stride;
uint32_t contextid = (addr & (plic->context_stride - 1));
+
if (contextid == 0) {
- if (RISCV_DEBUG_PLIC) {
- qemu_log("plic: write priority: hart%d-%c priority=%x\n",
- plic->addr_config[addrid].hartid,
- mode_to_char(plic->addr_config[addrid].mode),
- plic->target_priority[addrid]);
- }
if (value <= plic->num_priorities) {
plic->target_priority[addrid] = value;
sifive_plic_update(plic);
}
- return;
} else if (contextid == 4) {
- if (RISCV_DEBUG_PLIC) {
- qemu_log("plic: write claim: hart%d-%c irq=%x\n",
- plic->addr_config[addrid].hartid,
- mode_to_char(plic->addr_config[addrid].mode),
- (uint32_t)value);
- }
if (value < plic->num_sources) {
sifive_plic_set_claimed(plic, value, false);
sifive_plic_update(plic);
}
- return;
+ } else {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Invalid context write 0x%" HWADDR_PRIx "\n",
+ __func__, addr);
}
+ } else {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Invalid register write 0x%" HWADDR_PRIx "\n",
+ __func__, addr);
}
-
-err:
- qemu_log_mask(LOG_GUEST_ERROR,
- "%s: Invalid register write 0x%" HWADDR_PRIx "\n",
- __func__, addr);
}
static const MemoryRegionOps sifive_plic_ops = {
--
2.31.1
next prev parent reply other threads:[~2022-01-05 22:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-05 21:39 [PATCH v4 0/8] A collection of RISC-V cleanups and improvements Alistair Francis
2022-01-05 21:39 ` [PATCH v4 1/8] hw/intc: sifive_plic: Add a reset function Alistair Francis
2022-01-05 21:39 ` Alistair Francis [this message]
2022-01-05 21:39 ` [PATCH v4 3/8] hw/intc: sifive_plic: Cleanup the read function Alistair Francis
2022-01-05 21:39 ` [PATCH v4 4/8] hw/intc: sifive_plic: Cleanup remaining functions Alistair Francis
2022-01-05 21:39 ` [PATCH v4 5/8] target/riscv: Mark the Hypervisor extension as non experimental Alistair Francis
2022-01-05 21:39 ` [PATCH v4 6/8] target/riscv: Enable the Hypervisor extension by default Alistair Francis
2022-01-05 21:39 ` [PATCH v4 7/8] hw/riscv: Use error_fatal for SoC realisation Alistair Francis
2022-01-05 21:39 ` [PATCH v4 8/8] hw/riscv: virt: Allow support for 32 cores Alistair Francis
2022-01-05 22:28 ` [PATCH v4 0/8] A collection of RISC-V cleanups and improvements Alistair Francis
2022-01-05 22:28 ` Alistair Francis
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