| Message ID | 1431893048-5214-36-git-send-email-parth.dixit@linaro.org |
|---|---|
| State | New |
| Headers | show |
+shannon On 8 June 2015 at 22:29, Julien Grall <julien.grall@citrix.com> wrote: > Hi, > > On 17/05/2015 21:04, Parth Dixit wrote: >> >> Add helper functions for calculating crc32. >> This is required for computing crc of efi table. >> These functions are copied from here >> http://mirrors.neusoft.edu.cn/rpi-kernel/lib/xz/xz_crc32.c >> Original author's are Lasse Collin and Igor Pavlov. > > > I'm nearly sure this patch will break compilation during bisection... > > Anyway, the function xz_crc32_* already exist in the tree. Please use them. > > Regards, > > -- > Julien Grall
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 36b072b..0ad70c1 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1227,6 +1227,39 @@ static int handle_node(struct domain *d, struct kernel_info *kinfo, } #ifdef CONFIG_ACPI +static uint32_t xz_crc32_table[256]; + +static void xz_crc32_init(void) +{ + const uint32_t poly = 0xEDB88320; + + uint32_t i; + uint32_t j; + uint32_t r; + + for (i = 0; i < 256; ++i) { + r = i; + for (j = 0; j < 8; ++j) + r = (r >> 1) ^ (poly & ~((r & 1) - 1)); + + xz_crc32_table[i] = r; + } + + return; +} + +static uint32_t xz_crc32(uint8_t *buf, size_t size, uint32_t crc) +{ + crc = ~crc; + + while (size != 0) { + crc = xz_crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8); + --size; + } + + return ~crc; +} + static int create_xen_acpi_tables(struct kernel_info *kinfo, struct domain *d, struct membank tbl_add[]) {
Add helper functions for calculating crc32. This is required for computing crc of efi table. These functions are copied from here http://mirrors.neusoft.edu.cn/rpi-kernel/lib/xz/xz_crc32.c Original author's are Lasse Collin and Igor Pavlov. Signed-off-by: Parth Dixit <parth.dixit@linaro.org> --- xen/arch/arm/domain_build.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)