From b39392a98b6df7de221fadfdac07ecfd1497732e Mon Sep 17 00:00:00 2001
From: stroese <stroese>
Date: Thu, 16 Dec 2004 18:13:53 +0000
Subject: [PATCH] CPU speed calculation updated (fixed a rounding problem)
---
cpu/ppc4xx/speed.c | 48 ++++++++++++++--------------------------------
1 file changed, 14 insertions(+), 34 deletions(-)
diff --git a/cpu/ppc4xx/speed.c b/cpu/ppc4xx/speed.c
index be0de0c32a0..0d6d88a2abb 100644
--- a/cpu/ppc4xx/speed.c
+++ b/cpu/ppc4xx/speed.c
@@ -132,10 +132,10 @@ void get_sys_info (PPC405_SYS_INFO * sysInfo)
m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv;
}
- sysInfo->freqVCOMhz = (1000000 * m) / sysClkPeriodPs;
- sysInfo->freqProcessor = (sysInfo->freqVCOMhz * 1000000) / sysInfo->pllFwdDiv;
- sysInfo->freqPLB = (sysInfo->freqVCOMhz * 1000000) /
- (sysInfo->pllFwdDivB * sysInfo->pllPlbDiv);
+ sysInfo->freqVCOHz = (1000000000000LL * (unsigned long long)m) /
+ (unsigned long long)sysClkPeriodPs;
+ sysInfo->freqProcessor = sysInfo->freqVCOHz / sysInfo->pllFwdDiv;
+ sysInfo->freqPLB = sysInfo->freqVCOHz / (sysInfo->pllFwdDivB * sysInfo->pllPlbDiv);
} else {
/*
* Check pllFwdDiv to see if running in bypass mode where the CPU speed
@@ -148,26 +148,14 @@ void get_sys_info (PPC405_SYS_INFO * sysInfo)
sysInfo->freqProcessor = CONFIG_SYS_CLK_FREQ;
sysInfo->freqPLB = CONFIG_SYS_CLK_FREQ / sysInfo->pllPlbDiv;
} else {
- sysInfo->freqVCOMhz = ( 1000000 *
- sysInfo->pllFwdDiv *
- sysInfo->pllFbkDiv *
- sysInfo->pllPlbDiv
- ) / sysClkPeriodPs;
- if (sysInfo->freqVCOMhz >= VCO_MIN
- && sysInfo->freqVCOMhz <= VCO_MAX) {
- sysInfo->freqPLB = (ONE_BILLION /
- ((sysClkPeriodPs * 10) /
- sysInfo->pllFbkDiv)) * 10000;
- sysInfo->freqProcessor = sysInfo->freqPLB * sysInfo->pllPlbDiv;
- } else {
- printf ("\nInvalid VCO frequency calculated : %ld MHz \a\n",
- sysInfo->freqVCOMhz);
- printf ("It must be between %d-%d MHz \a\n",
- VCO_MIN, VCO_MAX);
- printf ("PLL Mode reg : %8.8lx\a\n",
- pllmr);
- hang ();
- }
+ sysInfo->freqVCOHz = ( 1000000000000LL *
+ (unsigned long long)sysInfo->pllFwdDiv *
+ (unsigned long long)sysInfo->pllFbkDiv *
+ (unsigned long long)sysInfo->pllPlbDiv
+ ) / (unsigned long long)sysClkPeriodPs;
+ sysInfo->freqPLB = (ONE_BILLION / ((sysClkPeriodPs * 10) /
+ sysInfo->pllFbkDiv)) * 10000;
+ sysInfo->freqProcessor = sysInfo->freqPLB * sysInfo->pllPlbDiv;
}
}
}
@@ -376,7 +364,8 @@ void get_sys_info (PPC405_SYS_INFO * sysInfo)
/*
* Determine VCO clock frequency
*/
- sysInfo->freqVCOMhz = (1000000 * m) / sysClkPeriodPs;
+ sysInfo->freqVCOHz = (1000000000000LL * (unsigned long long)m) /
+ (unsigned long long)sysClkPeriodPs;
/*
* Determine CPU clock frequency
@@ -398,15 +387,6 @@ void get_sys_info (PPC405_SYS_INFO * sysInfo)
* Determine PLB clock frequency
*/
sysInfo->freqPLB = sysInfo->freqProcessor / sysInfo->pllPlbDiv;
-
- if (!((sysInfo->freqVCOMhz >= VCO_MIN) && (sysInfo->freqVCOMhz <= VCO_MAX))) {
- printf ("\nInvalid VCO frequency calculated : %ld MHz \a\n",
- sysInfo->freqVCOMhz);
- printf ("It must be between %d-%d MHz \a\n", VCO_MIN, VCO_MAX);
- printf ("PLL Mode reg 0 : %8.8lx\a\n", pllmr0);
- printf ("PLL Mode reg 1 : %8.8lx\a\n", pllmr1);
- hang ();
- }
}
--
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