[dpdk-dev] [PATCH v3 03/15] bus/pci: add fallback for out[lwb]_p for non GNU libc

[Natanael Copa]

On Sat, 30 Mar 2019 23:22:27 +0100
Thomas Monjalon <thomas at monjalon.net> wrote:

> 13/03/2019 18:06, Natanael Copa:
> > 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  
> 
> Please use this syntax:
> Bugzilla ID: 35

Ok.

> 
> [...]
> >  #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  
> [...]
> >  #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  
> 
> Could we manage non-x86 case in the macros pci_uio_out?

I did that in separate commit. Do you want do both in same commit?

> 
> Thanks
> 
>