[PATCH 2/2] bsp/sparc: Flush only instruction cache
Joel Sherrill
joel.sherrill at oarcorp.com
Thu Jul 3 15:58:49 UTC 2014
OK except one style comment.
On 7/3/2014 4:39 AM, Daniel Cederman wrote:
> The flush instruction on LEON flushes both the data and the instruction
> cache. Flushing of just the instruction cache can be done by setting
> the "flush instruction cache" bit in the cache control register.
> ---
> c/src/lib/libbsp/sparc/leon3/include/cache_.h | 4 +++-
> c/src/lib/libbsp/sparc/leon3/include/leon.h | 1 +
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/c/src/lib/libbsp/sparc/leon3/include/cache_.h b/c/src/lib/libbsp/sparc/leon3/include/cache_.h
> index 70c1e2c..8339114 100644
> --- a/c/src/lib/libbsp/sparc/leon3/include/cache_.h
> +++ b/c/src/lib/libbsp/sparc/leon3/include/cache_.h
> @@ -134,7 +134,9 @@ static inline void _CPU_cache_unfreeze_data(void)
>
> static inline void _CPU_cache_invalidate_entire_instruction(void)
> {
> - __asm__ volatile ("flush");
> + uint32_t cache_reg = leon3_get_cache_control_register();
Please add a blank line after the variable declaration.
> + cache_reg |= LEON3_REG_CACHE_CTRL_FI;
> + leon3_set_cache_control_register(cache_reg);
> }
>
> static inline void _CPU_cache_invalidate_instruction_range(
> diff --git a/c/src/lib/libbsp/sparc/leon3/include/leon.h b/c/src/lib/libbsp/sparc/leon3/include/leon.h
> index a62ad29..bc3cdde 100644
> --- a/c/src/lib/libbsp/sparc/leon3/include/leon.h
> +++ b/c/src/lib/libbsp/sparc/leon3/include/leon.h
> @@ -90,6 +90,7 @@ extern "C" {
> * The following defines the bits in the LEON Cache Control Register.
> */
> #define LEON3_REG_CACHE_CTRL_DS 0x00800000 /* Data cache snooping */
> +#define LEON3_REG_CACHE_CTRL_FI 0x00200000 /* Flush instruction cache */
>
> /* LEON3 Interrupt Controller */
> extern volatile struct irqmp_regs *LEON3_IrqCtrl_Regs;
--
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherrill at OARcorp.com On-Line Applications Research
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