[03/15] bus/pci: add fallback for out[lwb]_p for non GNU libc
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Commit Message
Add a fallback for non-GNU libc systems like musl libc for the
non-standard functions outl_p, outw_p and outb_p.
This ifixes the following buildtime errors when building with musl libc:
pci_uio.c:(.text+0xaa1): undefined reference to `outw_p'
pci_uio.c:(.text+0xac5): undefined reference to `outl_p'
pci_uio.c:(.text+0xadf): undefined reference to `outb_p'
fixes https://bugs.dpdk.org/show_bug.cgi?id=35
Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
---
Please note that this is only compile tested with musl libc.
drivers/bus/pci/linux/pci_uio.c | 32 +++++++++++++++++++++++++++++---
1 file changed, 29 insertions(+), 3 deletions(-)
@@ -14,6 +14,32 @@
#if defined(RTE_ARCH_X86)
#include <sys/io.h>
+#if defined(__GLIBC__)
+#define pci_uio_outl_p outl_p
+#define pci_uio_outw_p outw_p
+#define pci_uio_outb_p outb_p
+#else
+static inline void
+pci_uio_outl_p(unsigned int value, unsigned short int port)
+{
+ __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (value),
+ "Nd" (port));
+}
+
+static inline void
+pci_uio_outw_p(unsigned short int value, unsigned short int port)
+{
+ __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (value),
+ "Nd" (port));
+}
+
+static inline void
+pci_uio_outb_p(unsigned char value, unsigned short int port)
+{
+ __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (value),
+ "Nd" (port));
+}
+#endif
#endif
#include <rte_log.h>
@@ -527,21 +553,21 @@ pci_uio_ioport_write(struct rte_pci_ioport *p,
if (len >= 4) {
size = 4;
#if defined(RTE_ARCH_X86)
- outl_p(*(const uint32_t *)s, reg);
+ pci_uio_outl_p(*(const uint32_t *)s, reg);
#else
*(volatile uint32_t *)reg = *(const uint32_t *)s;
#endif
} else if (len >= 2) {
size = 2;
#if defined(RTE_ARCH_X86)
- outw_p(*(const uint16_t *)s, reg);
+ pci_uio_outw_p(*(const uint16_t *)s, reg);
#else
*(volatile uint16_t *)reg = *(const uint16_t *)s;
#endif
} else {
size = 1;
#if defined(RTE_ARCH_X86)
- outb_p(*s, reg);
+ pci_uio_outb_p(*s, reg);
#else
*(volatile uint8_t *)reg = *s;
#endif