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Re: [Qemu-devel] [PATCH] 64 bit I/O support v7


From: Robert Reif
Subject: Re: [Qemu-devel] [PATCH] 64 bit I/O support v7
Date: Fri, 01 May 2009 19:42:00 -0400
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.21) Gecko/20090303 SeaMonkey/1.1.15 (Ubuntu-1.1.15+nobinonly-0ubuntu2)

Robert Reif wrote:

static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
   m48t59_t *NVRAM = opaque;

   m48t59_write(NVRAM, addr, (value >> 24) & 0xff);
   m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff);
   m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff);
   m48t59_write(NVRAM, addr + 3, value & 0xff);
}

static void cirrus_vga_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
#ifdef TARGET_WORDS_BIGENDIAN
   cirrus_vga_mem_writeb(opaque, addr, (val >> 24) & 0xff);
   cirrus_vga_mem_writeb(opaque, addr + 1, (val >> 16) & 0xff);
   cirrus_vga_mem_writeb(opaque, addr + 2, (val >> 8) & 0xff);
   cirrus_vga_mem_writeb(opaque, addr + 3, val & 0xff);
#else
   cirrus_vga_mem_writeb(opaque, addr, val & 0xff);
   cirrus_vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
   cirrus_vga_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
   cirrus_vga_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
#endif
}

Should a new intermediate bus layer also do byte swapping?




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