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pistachio: add timer frequency for SOC; correct platform ID 

Corrected platform ID and added timer frequency for SOC.
The timer frequency is half the CPU frequency.

BUG=chrome-os-partner:31438
TEST=tested on Pistachio bring up board; behaves as expected.
BRANCH=none

Change-Id: If7e03232106b52f2522fc7da586bdaf95f5eefec
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: d94789950d5300bbe5defbf529480d8d545e743e
Original-Change-Id: I1187e4b5280eaf796777d882a2e154e2808e9e37
Original-Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/241426
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9193
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Ionela Voinescu 2015-01-19 02:39:18 +00:00 committed by Stefan Reinauer
parent f3bc026aca
commit 420b0f692b
2 changed files with 24 additions and 7 deletions
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12
src/soc/imgtec/pistachio/include/soc/cpu.h
View File

@ -18,14 +18,18 @@
#ifndef __SOC_IMGTEC_DANUBE_CPU_H__
#define __SOC_IMGTEC_DANUBE_CPU_H__
#include <arch/io.h>
#define IMG_SPIM0_BASE_ADDRESS 0xB8100F00
#define IMG_SPIM1_BASE_ADDRESS 0xB8101000
/*
* Reading at this address allows to identify the platform the code is running
* on.
* This register holds the FPGA image version
* If we're not working on the FPGA this will be 0
*/
#define IMG_PLATFORM_ID() (*((unsigned *)0xB8149060))
#define IMG_PLATFORM_ID_SILICON 0xF00D0006
#define PRIMARY_FPGA_VERSION 0xB8149060
#define IMG_PLATFORM_ID() read32(PRIMARY_FPGA_VERSION)
#define IMG_PLATFORM_ID_FPGA 0xD1400003 /* Last FPGA image */
#define IMG_PLATFORM_ID_SILICON 0
#endif

19
src/soc/imgtec/pistachio/monotonic_timer.c
View File

@ -23,6 +23,9 @@
#include <arch/cpu.h>
#include <soc/cpu.h>
#define PISTACHIO_CLOCK_SWITCH 0xB8144200
#define MIPS_EXTERN_PLL_BYPASS_MASK 0x00000002
static int get_count_mhz_freq(void)
{
static unsigned count_mhz_freq;
@ -30,10 +33,20 @@ static int get_count_mhz_freq(void)
if (!count_mhz_freq) {
if (IMG_PLATFORM_ID() != IMG_PLATFORM_ID_SILICON)
count_mhz_freq = 25; /* FPGA board */
/*
* Will need some means of finding out the counter
* frequency on a real SOC
else {
/* If MIPS PLL external bypass bit is set, it means
* that the MIPS PLL is already set up to work at a
* frequency of 550 MHz; otherwise, the crystal is
* used with a frequency of 52 MHz
*/
if (read32(PISTACHIO_CLOCK_SWITCH) &
MIPS_EXTERN_PLL_BYPASS_MASK)
/* Half MIPS PLL freq. */
count_mhz_freq = 275;
else
/* Half Xtal freq. */
count_mhz_freq = 26;
}
}
return count_mhz_freq;
}