[PATCH] serial: DCC(JTAG) serial and console emulation support
Nicolas Pitre
nico at fluxnic.net
Tue Oct 5 22:55:04 EDT 2010
On Tue, 5 Oct 2010, Daniel Walker wrote:
> +#if !defined(CONFIG_CPU_V7)
> +static inline char
> +__dcc_getchar(void)
> +{
> + char __c;
> +
> + asm("mrc p14, 0, %0, c0, c5, 0 @ read comms data reg"
> + : "=r" (__c) : : "cc");
> +
> + return __c;
> +}
> +#else
> +static inline char
> +__dcc_getchar(void)
> +{
> + char __c;
> +
> + asm(
> + "get_wait: mrc p14, 0, pc, c0, c1, 0 \n\
> + bne get_wait \n\
> + mrc p14, 0, %0, c0, c5, 0 @ read comms data reg"
> + : "=r" (__c) : : "cc");
> +
> + return __c;
> +}
> +#endif
> +
> +#if !defined(CONFIG_CPU_V7)
> +static inline void
> +__dcc_putchar(char c)
> +{
> + asm("mcr p14, 0, %0, c0, c5, 0 @ write a char"
> + : /* no output register */
> + : "r" (c) : "cc");
> +}
> +#else
> +static inline void
> +__dcc_putchar(char c)
> +{
> + asm(
> + "put_wait: mrc p14, 0, pc, c0, c1, 0 \n\
> + bcs put_wait \n\
> + mcr p14, 0, %0, c0, c5, 0 "
> + : : "r" (c) : "cc");
> +}
> +#endif
Please move the #ifdef conditionals inside the respective functions so
to have only one function pair with the various alternatives embedded
into them.
Nicolas
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