From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:57670) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sgsls-0006vK-3w for qemu-devel@nongnu.org; Tue, 19 Jun 2012 03:22:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Sgslq-0007K6-AE for qemu-devel@nongnu.org; Tue, 19 Jun 2012 03:22:39 -0400 Received: from gate.crashing.org ([63.228.1.57]:53259) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sgslp-0007Js-S9 for qemu-devel@nongnu.org; Tue, 19 Jun 2012 03:22:38 -0400 From: Benjamin Herrenschmidt Date: Tue, 19 Jun 2012 16:39:41 +1000 Message-Id: <1340087992-2399-3-git-send-email-benh@kernel.crashing.org> In-Reply-To: <1340087992-2399-1-git-send-email-benh@kernel.crashing.org> References: <1340087992-2399-1-git-send-email-benh@kernel.crashing.org> Subject: [Qemu-devel] [PATCH 02/13] Implement cpu_physical_memory_set() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: anthony@codemonkey.ws, David Gibson From: David Gibson 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 Signed-off-by: Benjamin Herrenschmidt --- cpu-common.h | 1 + exec.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/cpu-common.h b/cpu-common.h index 1fe3280..8d3596a 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 b5d6885..cfd7008 100644 --- a/exec.c +++ b/exec.c @@ -3601,6 +3601,21 @@ 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