diff options
| author | Prodyut Hazarika <phazarika@amcc.com> | 2008-08-20 09:38:51 -0700 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2008-08-21 10:31:16 +0200 |
| commit | 079589bcfb24ba11068460276a3cc9549ab5346f (patch) | |
| tree | 85b33c32aaafdedac703834bd763bbf25695f456 /cpu/ppc4xx/cpu_init.c | |
| parent | ba37aa03287c5483c61c0a3e320c8888bee0143a (diff) | |
ppc4xx: Optimize PLB4 Arbiter and Memory Queue settings for PPC440SP/SPe,
PPC405EX and PPC460EX/GT/SX
- Read pipeline depth set to 4 for PPC440SP/SPE, PPC405EX, PPC460EX/GT/SX
processors
- Moved PLB4 Arbiter register definitions to ppc4xx.h since it is shared
across processors (405 and 440/460)
- Optimize Memory Queue settings for PPC440SP/SPE and PPC460EX/GT/SX
processors
- Add register bit definitions for Memory Queue Configuration registers
Signed-off-by: Prodyut Hazarika <phazarika@amcc.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'cpu/ppc4xx/cpu_init.c')
| -rw-r--r-- | cpu/ppc4xx/cpu_init.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/cpu/ppc4xx/cpu_init.c b/cpu/ppc4xx/cpu_init.c index e2d04027815..281819af602 100644 --- a/cpu/ppc4xx/cpu_init.c +++ b/cpu/ppc4xx/cpu_init.c @@ -138,7 +138,9 @@ void reconfigure_pll(u32 new_cpu_freq) void cpu_init_f (void) { -#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX) +#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX) || \ + defined(CONFIG_440SP) || defined(CONFIG_440SPE) || defined(CONFIG_405EX) || \ + defined(CONFIG_460GT) || defined(CONFIG_460SX) u32 val; #endif @@ -301,6 +303,18 @@ cpu_init_f (void) val |= 0x400; mtsdr(SDR0_USB2HOST_CFG, val); #endif /* CONFIG_460EX */ + +#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \ + defined(CONFIG_460EX) || defined(CONFIG_460GT) || \ + defined(CONFIG_405EX) || defined(CONFIG_460SX) + /* + * Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read + */ + val = (mfdcr(plb0_acr) & ~plb0_acr_rdp_mask) | plb0_acr_rdp_4deep; + mtdcr(plb0_acr, val); + val = (mfdcr(plb1_acr) & ~plb1_acr_rdp_mask) | plb1_acr_rdp_4deep; + mtdcr(plb1_acr, val); +#endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */ } /* |