[U-Boot] [PATCH v3 10/11] x86: tsc: Remove legacy timer codes

Bin Meng bmeng.cn at gmail.com
Fri Nov 13 09:11:23 CET 2015


Now that we have converted all x86 boards to use driver model timer,
remove these legacy timer codes in the tsc driver.

Note this also removes the TSC_CALIBRATION_BYPASS Kconfig option,
as it is not needed with driver model.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
Acked-by: Simon Glass <sjg at chromium.org>
---

Changes in v3: None
Changes in v2: None

 arch/x86/Kconfig                   | 20 --------------
 arch/x86/cpu/qemu/Kconfig          |  1 -
 arch/x86/cpu/quark/Kconfig         |  5 ----
 arch/x86/include/asm/global_data.h |  1 -
 arch/x86/lib/tsc_timer.c           | 53 --------------------------------------
 configs/coreboot-x86_defconfig     |  1 -
 configs/efi-x86_defconfig          |  1 -
 7 files changed, 82 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8914be3..fef5601 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -279,26 +279,6 @@ config AP_STACK_SIZE
 	  the memory used by this initialisation process. Typically 4KB is
 	  enough space.
 
-config TSC_CALIBRATION_BYPASS
-	bool "Bypass Time-Stamp Counter (TSC) calibration"
-	default n
-	help
-	  By default U-Boot automatically calibrates Time-Stamp Counter (TSC)
-	  running frequency via Model-Specific Register (MSR) and Programmable
-	  Interval Timer (PIT). If the calibration does not work on your board,
-	  select this option and provide a hardcoded TSC running frequency with
-	  CONFIG_TSC_FREQ_IN_MHZ below.
-
-	  Normally this option should be turned on in a simulation environment
-	  like qemu.
-
-config TSC_FREQ_IN_MHZ
-	int "Time-Stamp Counter (TSC) running frequency in MHz"
-	depends on TSC_CALIBRATION_BYPASS
-	default 1000
-	help
-	  The running frequency in MHz of Time-Stamp Counter (TSC).
-
 config HAVE_VGA_BIOS
 	bool "Add a VGA BIOS image"
 	help
diff --git a/arch/x86/cpu/qemu/Kconfig b/arch/x86/cpu/qemu/Kconfig
index fb775d7..4f98621 100644
--- a/arch/x86/cpu/qemu/Kconfig
+++ b/arch/x86/cpu/qemu/Kconfig
@@ -6,7 +6,6 @@
 
 config QEMU
 	bool
-	select TSC_CALIBRATION_BYPASS
 
 if QEMU
 
diff --git a/arch/x86/cpu/quark/Kconfig b/arch/x86/cpu/quark/Kconfig
index bc961ef..163caac 100644
--- a/arch/x86/cpu/quark/Kconfig
+++ b/arch/x86/cpu/quark/Kconfig
@@ -7,7 +7,6 @@
 config INTEL_QUARK
 	bool
 	select HAVE_RMU
-	select TSC_CALIBRATION_BYPASS
 
 if INTEL_QUARK
 
@@ -119,8 +118,4 @@ config SYS_CAR_SIZE
 	  Space in bytes in eSRAM used as Cache-As-ARM (CAR).
 	  Note this size must not exceed eSRAM's total size.
 
-config TSC_FREQ_IN_MHZ
-	int
-	default 400
-
 endif
diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h
index 5966b7c..0ca518c 100644
--- a/arch/x86/include/asm/global_data.h
+++ b/arch/x86/include/asm/global_data.h
@@ -54,7 +54,6 @@ struct arch_global_data {
 	uint8_t x86_mask;
 	uint32_t x86_device;
 	uint64_t tsc_base;		/* Initial value returned by rdtsc() */
-	uint32_t tsc_mhz;		/* TSC frequency in MHz */
 	void *new_fdt;			/* Relocated FDT */
 	uint32_t bist;			/* Built-in self test value */
 	enum pei_boot_mode_t pei_boot_mode;
diff --git a/arch/x86/lib/tsc_timer.c b/arch/x86/lib/tsc_timer.c
index 4a95959..6aa2437 100644
--- a/arch/x86/lib/tsc_timer.c
+++ b/arch/x86/lib/tsc_timer.c
@@ -280,63 +280,12 @@ success:
 	return delta / 1000;
 }
 
-#ifndef CONFIG_TIMER
-void timer_set_base(u64 base)
-{
-	gd->arch.tsc_base = base;
-}
-
-/*
- * Get the number of CPU time counter ticks since it was read first time after
- * restart. This yields a free running counter guaranteed to take almost 6
- * years to wrap around even at 100GHz clock rate.
- */
-u64 notrace get_ticks(void)
-{
-	u64 now_tick = rdtsc();
-
-	/* We assume that 0 means the base hasn't been set yet */
-	if (!gd->arch.tsc_base)
-		panic("No tick base available");
-	return now_tick - gd->arch.tsc_base;
-}
-#endif /* CONFIG_TIMER */
-
 /* Get the speed of the TSC timer in MHz */
 unsigned notrace long get_tbclk_mhz(void)
 {
-#ifdef CONFIG_TIMER
 	return get_tbclk() / 1000000;
-#else
-	unsigned long fast_calibrate;
-
-	if (gd->arch.tsc_mhz)
-		return gd->arch.tsc_mhz;
-
-#ifdef CONFIG_TSC_CALIBRATION_BYPASS
-	fast_calibrate = CONFIG_TSC_FREQ_IN_MHZ;
-#else
-	fast_calibrate = try_msr_calibrate_tsc();
-	if (!fast_calibrate) {
-
-		fast_calibrate = quick_pit_calibrate();
-		if (!fast_calibrate)
-			panic("TSC frequency is ZERO");
-	}
-#endif
-
-	gd->arch.tsc_mhz = fast_calibrate;
-	return fast_calibrate;
-#endif
 }
 
-#ifndef CONFIG_TIMER
-unsigned long get_tbclk(void)
-{
-	return get_tbclk_mhz() * 1000 * 1000;
-}
-#endif
-
 static ulong get_ms_timer(void)
 {
 	return (get_ticks() * 1000) / get_tbclk();
@@ -386,7 +335,6 @@ int timer_init(void)
 	return 0;
 }
 
-#ifdef CONFIG_TIMER
 static int tsc_timer_get_count(struct udevice *dev, u64 *count)
 {
 	u64 now_tick = rdtsc();
@@ -439,4 +387,3 @@ U_BOOT_DRIVER(tsc_timer) = {
 	.ops	= &tsc_timer_ops,
 	.flags = DM_FLAG_PRE_RELOC,
 };
-#endif /* CONFIG_TIMER */
diff --git a/configs/coreboot-x86_defconfig b/configs/coreboot-x86_defconfig
index 3f2cff8..6fb38f0 100644
--- a/configs/coreboot-x86_defconfig
+++ b/configs/coreboot-x86_defconfig
@@ -1,7 +1,6 @@
 CONFIG_X86=y
 CONFIG_VENDOR_COREBOOT=y
 CONFIG_TARGET_COREBOOT=y
-CONFIG_TSC_CALIBRATION_BYPASS=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_SETEXPR is not set
diff --git a/configs/efi-x86_defconfig b/configs/efi-x86_defconfig
index fd90739..7354f04 100644
--- a/configs/efi-x86_defconfig
+++ b/configs/efi-x86_defconfig
@@ -2,7 +2,6 @@ CONFIG_X86=y
 CONFIG_VENDOR_EFI=y
 CONFIG_DEFAULT_DEVICE_TREE="efi"
 CONFIG_TARGET_EFI=y
-CONFIG_TSC_CALIBRATION_BYPASS=y
 # CONFIG_CMD_BOOTM is not set
 # CONFIG_CMD_NET is not set
 CONFIG_OF_CONTROL=y
-- 
1.8.2.1



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