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[Qemu-devel] [PATCH 02/12] Implement cpu_physical_memory_set()
From: |
Benjamin Herrenschmidt |
Subject: |
[Qemu-devel] [PATCH 02/12] Implement cpu_physical_memory_set() |
Date: |
Wed, 16 May 2012 14:27:15 +1000 |
From: David Gibson <address@hidden>
This patch adds cpu_physical_memory_set() function. This is equivalent to
calling cpu_physical_memory_write() with a buffer filled with a character,
ie, a memset of target memory.
It uses a small temporary buffer on the stack.
Signed-off-by: David Gibson <address@hidden>
Signed-off-by: Benjamin Herrenschmidt <address@hidden>
---
cpu-common.h | 1 +
exec.c | 15 +++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/cpu-common.h b/cpu-common.h
index dca5175..be6b9f3 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -53,6 +53,7 @@ void qemu_ram_set_idstr(ram_addr_t addr, const char *name,
DeviceState *dev);
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
int len, int is_write);
+void cpu_physical_memory_set(target_phys_addr_t addr, uint8_t c, int len);
static inline void cpu_physical_memory_read(target_phys_addr_t addr,
void *buf, int len)
{
diff --git a/exec.c b/exec.c
index 0607c9b..40cf52d 100644
--- a/exec.c
+++ b/exec.c
@@ -3581,6 +3581,21 @@ void cpu_physical_memory_rw(target_phys_addr_t addr,
uint8_t *buf,
}
}
+void cpu_physical_memory_set(target_phys_addr_t addr, uint8_t c, int len)
+{
+#define FILLBUF_SIZE 512
+ uint8_t fillbuf[FILLBUF_SIZE];
+ int l;
+
+ memset(fillbuf, c, FILLBUF_SIZE);
+ while (len > 0) {
+ l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE;
+ cpu_physical_memory_rw(addr, fillbuf, l, true);
+ len -= len;
+ addr += len;
+ }
+}
+
/* used for ROM loading : can write in RAM and ROM */
void cpu_physical_memory_write_rom(target_phys_addr_t addr,
const uint8_t *buf, int len)
--
1.7.9.5
- [Qemu-devel] [PATCH 00/12] IOMMU Infrastructure, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 02/12] Implement cpu_physical_memory_set(),
Benjamin Herrenschmidt <=
- [Qemu-devel] [PATCH 01/12] Better support for dma_addr_t variables, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 04/12] usb-ohci: Use universal DMA helper functions, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 03/12] iommu: Add universal DMA helper functions, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 05/12] iommu: Make sglists and dma_bdrv helpers use new universal DMA helpers, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 06/12] ide/ahci: Use universal DMA helper functions, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 07/12] usb: Convert usb_packet_{map, unmap} to universal DMA helpers, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 08/12] iommu: Introduce IOMMU emulation infrastructure, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 09/12] iommu: Add facility to cancel in-use dma memory maps, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 10/12] pseries: Convert sPAPR TCEs to use generic IOMMU infrastructure, Benjamin Herrenschmidt, 2012/05/16
- [Qemu-devel] [PATCH 12/12] pseries: Implement IOMMU and DMA for PAPR PCI devices, Benjamin Herrenschmidt, 2012/05/16