round2 [PATCH 6/6] sparc-leon specific SRMMU initialization and bootup fixes. The sparc-leon caches are virtually tagged so a flush is needed on ctx switch.

From: Konrad Eisele <konrad@gaisler.com>

---
 arch/sparc/mm/srmmu.c |   66 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 65 insertions(+), 1 deletions(-)

On Fri, Jun 12, 2009 at 10:44:36AM +0200, konrad@gaisler.com wrote:
> From: Konrad Eisele <konrad@gaisler.com>
> 
> ---
>  arch/sparc/mm/srmmu.c |   66 ++++++++++++++++++++++++++++++++++++++++++++++++-
>  1 files changed, 65 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
> index 06c9a7d..ae217cc 100644
> --- a/arch/sparc/mm/srmmu.c
> +++ b/arch/sparc/mm/srmmu.c
> @@ -45,6 +45,7 @@
>  #include <asm/tsunami.h>
>  #include <asm/swift.h>
>  #include <asm/turbosparc.h>
> +#include <asm/leon.h>
>  
>  #include <asm/btfixup.h>
>  
> @@ -568,6 +569,10 @@ static void srmmu_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
>  		srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
>  	}
>  
> +	if (sparc_cpu_model == sparc_leon) {
> +		leon_switch_mm();
> +	}
> +	
>  	if (is_hypersparc)
>  		hyper_flush_whole_icache();
>  
> @@ -1976,6 +1981,58 @@ static void __init init_viking(void)
>  	poke_srmmu = poke_viking;
>  }
>  
> +#ifdef CONFIG_SPARC_LEON
> +
> +extern void leon_flush_icache_all(void);
> +extern void leon_flush_dcache_all(void);
> +extern void leon_flush_pcache_all(struct vm_area_struct *vma,
> +				  unsigned long page);
> +extern void leon_flush_cache_all(void);
> +extern void leon_flush_tlb_all(void);
> +extern int leon_flush_during_switch ;
> +extern int leon_flush_needed(void);
> +extern void leon_flush_pcache_all(struct vm_area_struct *vma,
> +				  unsigned long page);

Move to leon_srmmu.h please.


> +
> +void __init poke_leonsparc(void)
> +{
> +}
> +
> +void __init init_leon(void)
> +{
> +
> +	srmmu_name = "Leon";
> +
> +	BTFIXUPSET_CALL(flush_cache_all, leon_flush_cache_all,
> +			BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_cache_mm, leon_flush_cache_all,
> +			BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_cache_page, leon_flush_pcache_all,
> +			BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_cache_range, leon_flush_cache_all,
> +			BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_page_for_dma, leon_flush_dcache_all,
> +			BTFIXUPCALL_NORM);
> +
> +	BTFIXUPSET_CALL(flush_tlb_all, leon_flush_tlb_all, BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_tlb_mm, leon_flush_tlb_all, BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_tlb_page, leon_flush_tlb_all, BTFIXUPCALL_NORM);
> +	BTFIXUPSET_CALL(flush_tlb_range, leon_flush_tlb_all, BTFIXUPCALL_NORM);
> +
> +	BTFIXUPSET_CALL(__flush_page_to_ram, leon_flush_cache_all,
> +			BTFIXUPCALL_NOP);
> +	BTFIXUPSET_CALL(flush_sig_insns, leon_flush_cache_all, BTFIXUPCALL_NOP);
> +
> +	poke_srmmu = poke_leonsparc;
> +
> +	srmmu_cache_pagetables = 0;
> +
> +	leon_flush_during_switch = leon_flush_needed();
> +}
> +#else
> +#define init_leon()
> +#endif
> +
>  /* Probe for the srmmu chip version. */
>  static void __init get_srmmu_type(void)
>  {
> @@ -1990,7 +2047,14 @@ static void __init get_srmmu_type(void)
>  	mod_rev = (mreg & 0x0f000000) >> 24;
>  	psr_typ = (psr >> 28) & 0xf;
>  	psr_vers = (psr >> 24) & 0xf;
> -
> +	
> +	if (sparc_cpu_model == sparc_leon) {
> +		psr_typ = 0xf;	/* hardcoded ids for older models/simulators */
> +		psr_vers = 2;
> +		init_leon(); /* macro if !CONFIG_SPARC_LEON */
> +		return;
> +	}
> +	
>  	/* First, check for HyperSparc or Cypress. */
>  	if(mod_typ == 1) {
>  		switch(mod_rev) {

	Sam
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