From a3e77fa5359b3f9f59e4e946b46d57a53057cc85 Mon Sep 17 00:00:00 2001 From: James Yang Date: Fri, 8 Feb 2008 18:05:08 -0600 Subject: [PATCH] 85xx: Speed up get_ddr_freq() and get_bus_freq() get_ddr_freq() and get_bus_freq() used get_sys_info() each time they were called. However, get_sys_info() recalculates extraneous information when called each time. Have get_ddr_freq() and get_bus_freq() return memoized values from global_data instead. Signed-off-by: James Yang Signed-off-by: Kumar Gala --- cpu/mpc85xx/speed.c | 21 +++++---------------- include/asm-ppc/global_data.h | 2 -- 2 files changed, 5 insertions(+), 18 deletions(-) diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c index 952f30c..d90d397 100644 --- a/cpu/mpc85xx/speed.c +++ b/cpu/mpc85xx/speed.c @@ -48,6 +48,8 @@ void get_sys_info (sys_info_t * sysInfo) * overflow for processor speeds above 2GHz */ half_freqSystemBus = sysInfo->freqSystemBus/2; sysInfo->freqProcessor = e500_ratio*half_freqSystemBus; + + /* Note: freqDDRBus is the MCLK frequency, not the data rate. */ sysInfo->freqDDRBus = sysInfo->freqSystemBus; #ifdef CONFIG_DDR_CLK_FREQ @@ -75,6 +77,7 @@ int get_clocks (void) get_sys_info (&sys_info); gd->cpu_clk = sys_info.freqProcessor; gd->bus_clk = sys_info.freqSystemBus; + gd->mem_clk = sys_info.freqDDRBus; gd->i2c1_clk = sys_info.freqSystemBus; gd->i2c2_clk = sys_info.freqSystemBus; @@ -96,14 +99,7 @@ int get_clocks (void) *********************************************/ ulong get_bus_freq (ulong dummy) { - ulong val; - - sys_info_t sys_info; - - get_sys_info (&sys_info); - val = sys_info.freqSystemBus; - - return val; + return gd->bus_clk; } /******************************************** @@ -112,12 +108,5 @@ ulong get_bus_freq (ulong dummy) *********************************************/ ulong get_ddr_freq (ulong dummy) { - ulong val; - - sys_info_t sys_info; - - get_sys_info (&sys_info); - val = sys_info.freqDDRBus; - - return val; + return gd->mem_clk; } diff --git a/include/asm-ppc/global_data.h b/include/asm-ppc/global_data.h index ff6624a..b43dba3 100644 --- a/include/asm-ppc/global_data.h +++ b/include/asm-ppc/global_data.h @@ -52,9 +52,7 @@ typedef struct global_data { unsigned long scc_clk; unsigned long brg_clk; #endif -#if defined(CONFIG_MPC7448HPC2) unsigned long mem_clk; -#endif #if defined(CONFIG_MPC83XX) /* There are other clocks in the MPC83XX */ u32 csb_clk; -- 2.7.4