x86: Move common CPU code to its own place
Some of the Intel CPU code is common to several Intel CPUs. Move it into a
common location along with required declarations.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/intel_common/cpu.c b/arch/x86/cpu/intel_common/cpu.c
new file mode 100644
index 0000000..1210943
--- /dev/null
+++ b/arch/x86/cpu/intel_common/cpu.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/cpu_common.h>
+#include <asm/intel_regs.h>
+#include <asm/lapic.h>
+#include <asm/lpc_common.h>
+#include <asm/msr.h>
+#include <asm/mtrr.h>
+#include <asm/post.h>
+#include <asm/microcode.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int report_bist_failure(void)
+{
+ if (gd->arch.bist != 0) {
+ post_code(POST_BIST_FAILURE);
+ printf("BIST failed: %08x\n", gd->arch.bist);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+int cpu_common_init(void)
+{
+ struct udevice *dev, *lpc;
+ int ret;
+
+ /* Halt if there was a built in self test failure */
+ ret = report_bist_failure();
+ if (ret)
+ return ret;
+
+ enable_lapic();
+
+ ret = microcode_update_intel();
+ if (ret && ret != -EEXIST)
+ return ret;
+
+ /* Enable upper 128bytes of CMOS */
+ writel(1 << 2, RCB_REG(RC));
+
+ /* Early chipset init required before RAM init can work */
+ uclass_first_device(UCLASS_NORTHBRIDGE, &dev);
+
+ ret = uclass_first_device(UCLASS_LPC, &lpc);
+ if (ret)
+ return ret;
+ if (!lpc)
+ return -ENODEV;
+
+ /* Cause the SATA device to do its early init */
+ uclass_first_device(UCLASS_DISK, &dev);
+
+ return 0;
+}
+
+int cpu_set_flex_ratio_to_tdp_nominal(void)
+{
+ msr_t flex_ratio, msr;
+ u8 nominal_ratio;
+
+ /* Check for Flex Ratio support */
+ flex_ratio = msr_read(MSR_FLEX_RATIO);
+ if (!(flex_ratio.lo & FLEX_RATIO_EN))
+ return -EINVAL;
+
+ /* Check for >0 configurable TDPs */
+ msr = msr_read(MSR_PLATFORM_INFO);
+ if (((msr.hi >> 1) & 3) == 0)
+ return -EINVAL;
+
+ /* Use nominal TDP ratio for flex ratio */
+ msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
+ nominal_ratio = msr.lo & 0xff;
+
+ /* See if flex ratio is already set to nominal TDP ratio */
+ if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio)
+ return 0;
+
+ /* Set flex ratio to nominal TDP ratio */
+ flex_ratio.lo &= ~0xff00;
+ flex_ratio.lo |= nominal_ratio << 8;
+ flex_ratio.lo |= FLEX_RATIO_LOCK;
+ msr_write(MSR_FLEX_RATIO, flex_ratio);
+
+ /* Set flex ratio in soft reset data register bits 11:6 */
+ clrsetbits_le32(RCB_REG(SOFT_RESET_DATA), 0x3f << 6,
+ (nominal_ratio & 0x3f) << 6);
+
+ debug("CPU: Soft reset to set up flex ratio\n");
+
+ /* Set soft reset control to use register value */
+ setbits_le32(RCB_REG(SOFT_RESET_CTRL), 1);
+
+ /* Issue warm reset, will be "CPU only" due to soft reset data */
+ outb(0x0, PORT_RESET);
+ outb(SYS_RST | RST_CPU, PORT_RESET);
+ cpu_hlt();
+
+ /* Not reached */
+ return -EINVAL;
+}