From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 06:25:13 +0000 (+1100) Subject: [POWERPC] Spider uses low level BE MMIO accessors X-Git-Tag: v2.6.20-rc1~34^2~40^2~8^2~122 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bc0f40c287a435805b0545ffc44ea41f11cd43e;p=linux-2.6 [POWERPC] Spider uses low level BE MMIO accessors We use the powerpc specific low level MMIO accessor variants instead of readl() or readl_be() because we know spidernet is not a real PCI device and we can thus avoid the performance hit caused by the PCI workarounds. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c index cef7e6671c..13e0a43e42 100644 --- a/drivers/net/spider_net.c +++ b/drivers/net/spider_net.c @@ -88,12 +88,11 @@ MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); static inline u32 spider_net_read_reg(struct spider_net_card *card, u32 reg) { - u32 value; - - value = readl(card->regs + reg); - value = le32_to_cpu(value); - - return value; + /* We use the powerpc specific variants instead of readl_be() because + * we know spidernet is not a real PCI device and we can thus avoid the + * performance hit caused by the PCI workarounds. + */ + return in_be32(card->regs + reg); } /** @@ -105,8 +104,11 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg) static inline void spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) { - value = cpu_to_le32(value); - writel(value, card->regs + reg); + /* We use the powerpc specific variants instead of writel_be() because + * we know spidernet is not a real PCI device and we can thus avoid the + * performance hit caused by the PCI workarounds. + */ + out_be32(card->regs + reg, value); } /** spider_net_write_phy - write to phy register