soc/intel/baytrail: Move to C_ENVIRONMENT_BOOTBLOCK

This moves programming BAR's and setting up console in the bootblock.

Change-Id: I062461cb7bfba2c4df4c20707ecda32f9857b164
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36873
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/baytrail/Kconfig

@@ -38,16 +38,11 @@ config CPU_SPECIFIC_OPTIONS
 	select INTEL_GMA_SWSMISCI
 	select CPU_INTEL_COMMON
 	select CPU_HAS_L2_ENABLE_MSR
-	select ROMCC_BOOTBLOCK
 
 config VBOOT
 	select VBOOT_MUST_REQUEST_DISPLAY
 	select VBOOT_STARTS_IN_ROMSTAGE
 
-config BOOTBLOCK_CPU_INIT
-	string
-	default "soc/intel/baytrail/bootblock/bootblock.c"
-
 config MMCONF_BASE_ADDRESS
 	hex
 	default 0xe0000000
@@ -97,14 +92,9 @@ config MRC_RMT
 # +-------------+ DCACHE_RAM_BASE + DCACHE_RAM_SIZE + DCACHE_RAM_MRC_VAR_SIZE
 # | MRC usage   |
 # |             |
-# +-------------+ DCACHE_RAM_BASE + DCACHE_RAM_SIZE
+# -------------+ DCACHE_RAM_BASE + DCACHE_RAM_SIZE
-# |  Stack      |
+# | coreboot    |
-# |    |        |
+# | usage       |
-# |    v        |
-# +-------------+
-# |    ^        |
-# |    |        |
-# | CAR Globals |
 # +-------------+ DCACHE_RAM_BASE
 #
 # Note that the MRC binary is linked to assume the region marked as "MRC usage"
@@ -130,6 +120,10 @@ config DCACHE_RAM_MRC_VAR_SIZE
 	help
 	  The amount of cache-as-ram region required by the reference code.
 
+config DCACHE_BSP_STACK_SIZE
+	hex
+	default 0x2000
+
 config RESET_ON_INVALID_RAMSTAGE_CACHE
 	bool "Reset the system on S3 wake when ramstage cache invalid."
 	default n

src/soc/intel/baytrail/Makefile.inc

@@ -9,14 +9,19 @@ subdirs-y += ../../../cpu/intel/microcode
 subdirs-y += ../../../cpu/intel/turbo
 subdirs-y += ../../../cpu/intel/common
 
+all-y += tsc_freq.c
+
+bootblock-y += ../../../cpu/intel/car/non-evict/cache_as_ram.S
+bootblock-y += ../../../cpu/intel/car/bootblock.c
+bootblock-y += ../../../cpu/x86/early_reset.S
+bootblock-y += bootblock/bootblock.c
+
 romstage-y += iosf.c
 romstage-y += memmap.c
 romstage-y += pmutil.c
-romstage-y += tsc_freq.c
 
 postcar-y += iosf.c
 postcar-y += memmap.c
-postcar-y += tsc_freq.c
 
 ramstage-y += acpi.c
 ramstage-y += chip.c
@@ -41,7 +46,6 @@ ramstage-y += scc.c
 ramstage-y += sd.c
 ramstage-y += smm.c
 ramstage-y += southcluster.c
-ramstage-y += tsc_freq.c
 ramstage-y += xhci.c
 ramstage-$(CONFIG_ELOG) += elog.c
 ramstage-$(CONFIG_HAVE_REFCODE_BLOB) += refcode.c

src/soc/intel/baytrail/bootblock/bootblock.c

@@ -13,38 +13,14 @@
  * GNU General Public License for more details.
  */
 
+#include <cpu/intel/car/bootblock.h>
 #include <device/pci_ops.h>
-#include <cpu/x86/cache.h>
-#include <cpu/x86/msr.h>
-#include <cpu/x86/mtrr.h>
 #include <soc/iosf.h>
-#include <cpu/intel/microcode/microcode.c>
+#include <soc/iomap.h>
-
+#include <soc/gpio.h>
-static void set_var_mtrr(int reg, uint32_t base, uint32_t size, int type)
+#include <soc/lpc.h>
-{
+#include <soc/spi.h>
-	msr_t basem, maskm;
+#include <soc/pmc.h>
-	basem.lo = base | type;
-	basem.hi = 0;
-	wrmsr(MTRR_PHYS_BASE(reg), basem);
-	maskm.lo = ~(size - 1) | MTRR_PHYS_MASK_VALID;
-	maskm.hi = (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1;
-	wrmsr(MTRR_PHYS_MASK(reg), maskm);
-}
-
-static void enable_rom_caching(void)
-{
-	msr_t msr;
-
-	disable_cache();
-	/* Why only top 4MiB ? */
-	set_var_mtrr(1, 0xffc00000, 4*1024*1024, MTRR_TYPE_WRPROT);
-	enable_cache();
-
-	/* Enable Variable MTRRs */
-	msr.hi = 0x00000000;
-	msr.lo = 0x00000800;
-	wrmsr(MTRR_DEF_TYPE_MSR, msr);
-}
 
 static void setup_mmconfig(void)
 {
@@ -64,12 +40,86 @@ static void setup_mmconfig(void)
 	pci_io_write_config32(IOSF_PCI_DEV, MCR_REG, reg);
 }
 
-static void bootblock_cpu_init(void)
+static void program_base_addresses(void)
+{
+	uint32_t reg;
+	const uint32_t lpc_dev = PCI_DEV(0, LPC_DEV, LPC_FUNC);
+
+	/* Memory Mapped IO registers. */
+	reg = PMC_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, PBASE, reg);
+	reg = IO_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, IOBASE, reg);
+	reg = ILB_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, IBASE, reg);
+	reg = SPI_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, SBASE, reg);
+	reg = MPHY_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, MPBASE, reg);
+	reg = PUNIT_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, PUBASE, reg);
+	reg = RCBA_BASE_ADDRESS | 1;
+	pci_write_config32(lpc_dev, RCBA, reg);
+
+	/* IO Port Registers. */
+	reg = ACPI_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, ABASE, reg);
+	reg = GPIO_BASE_ADDRESS | 2;
+	pci_write_config32(lpc_dev, GBASE, reg);
+}
+
+static void spi_init(void)
+{
+	u32 *scs = (u32 *)(SPI_BASE_ADDRESS + SCS);
+	u32 *bcr = (u32 *)(SPI_BASE_ADDRESS + BCR);
+	uint32_t reg;
+
+	/* Disable generating SMI when setting WPD bit. */
+	write32(scs, read32(scs) & ~SMIWPEN);
+	/*
+	 * Enable caching and prefetching in the SPI controller. Disable
+	 * the SMM-only BIOS write and set WPD bit.
+	 */
+	reg = (read32(bcr) & ~SRC_MASK) | SRC_CACHE_PREFETCH | BCR_WPD;
+	reg &= ~EISS;
+	write32(bcr, reg);
+}
+
+static void tco_disable(void)
+{
+	uint32_t reg;
+
+	reg = inl(ACPI_BASE_ADDRESS + TCO1_CNT);
+	reg |= TCO_TMR_HALT;
+	outl(reg, ACPI_BASE_ADDRESS + TCO1_CNT);
+}
+
+static void byt_config_com1_and_enable(void)
+{
+	uint32_t reg;
+
+	/* Enable the UART hardware for COM1. */
+	reg = 1;
+	pci_write_config32(PCI_DEV(0, LPC_DEV, 0), UART_CONT, reg);
+
+	/* Set up the pads to select the UART function */
+	score_select_func(UART_RXD_PAD, 1);
+	score_select_func(UART_TXD_PAD, 1);
+}
+
+/* The distinction between nb/sb/cpu is not applicable here so
+   just pick the one that is called first. */
+void bootblock_early_northbridge_init(void)
 {
 	/* Allow memory-mapped PCI config access. */
 	setup_mmconfig();
 
-	/* Load microcode before any caching. */
+	program_base_addresses();
-	intel_update_microcode_from_cbfs();
+
-	enable_rom_caching();
+	tco_disable();
+
+	if (CONFIG(ENABLE_BUILTIN_COM1))
+		byt_config_com1_and_enable();
+
+	spi_init();
 }

src/soc/intel/baytrail/include/soc/romstage.h

@@ -24,8 +24,6 @@ void mainboard_fill_mrc_params(struct mrc_params *mp);
 
 void raminit(struct mrc_params *mp, int prev_sleep_state);
 void gfx_init(void);
-void tco_disable(void);
 void punit_init(void);
-void byt_config_com1_and_enable(void);
 
 #endif /* _BAYTRAIL_ROMSTAGE_H_ */

src/soc/intel/baytrail/romstage/Makefile.inc

@@ -1,9 +1,5 @@
-cpu_incs-y += $(src)/cpu/intel/car/non-evict/cache_as_ram.S
-cpu_incs-y += $(obj)/fmap_config.h
-
 romstage-y += ../../../../cpu/intel/car/romstage.c
 romstage-y += romstage.c
 romstage-y += raminit.c
-romstage-$(CONFIG_ENABLE_BUILTIN_COM1) += uart.c
 romstage-y += gfx.c
 romstage-y += pmc.c

src/soc/intel/baytrail/romstage/pmc.c

@@ -14,7 +14,6 @@
  */
 
 #include <stddef.h>
-#include <arch/io.h>
 #include <device/pci_ops.h>
 #include <console/console.h>
 #include <device/device.h>
@@ -27,15 +26,6 @@
 #include <soc/romstage.h>
 #include "../chip.h"
 
-void tco_disable(void)
-{
-	uint32_t reg;
-
-	reg = inl(ACPI_BASE_ADDRESS + TCO1_CNT);
-	reg |= TCO_TMR_HALT;
-	outl(reg, ACPI_BASE_ADDRESS + TCO1_CNT);
-}
-
 /* This sequence signals the PUNIT to start running. */
 void punit_init(void)
 {

src/soc/intel/baytrail/romstage/romstage.c

@@ -27,60 +27,11 @@
 #include <romstage_handoff.h>
 #include <string.h>
 #include <timestamp.h>
-#include <vendorcode/google/chromeos/chromeos.h>
-#include <soc/gpio.h>
 #include <soc/iomap.h>
-#include <soc/lpc.h>
 #include <soc/msr.h>
 #include <soc/pci_devs.h>
 #include <soc/pmc.h>
 #include <soc/romstage.h>
-#include <soc/spi.h>
-
-static void program_base_addresses(void)
-{
-	uint32_t reg;
-	const uint32_t lpc_dev = PCI_DEV(0, LPC_DEV, LPC_FUNC);
-
-	/* Memory Mapped IO registers. */
-	reg = PMC_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, PBASE, reg);
-	reg = IO_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, IOBASE, reg);
-	reg = ILB_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, IBASE, reg);
-	reg = SPI_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, SBASE, reg);
-	reg = MPHY_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, MPBASE, reg);
-	reg = PUNIT_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, PUBASE, reg);
-	reg = RCBA_BASE_ADDRESS | 1;
-	pci_write_config32(lpc_dev, RCBA, reg);
-
-	/* IO Port Registers. */
-	reg = ACPI_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, ABASE, reg);
-	reg = GPIO_BASE_ADDRESS | 2;
-	pci_write_config32(lpc_dev, GBASE, reg);
-}
-
-static void spi_init(void)
-{
-	u32 *scs = (u32 *)(SPI_BASE_ADDRESS + SCS);
-	u32 *bcr = (u32 *)(SPI_BASE_ADDRESS + BCR);
-	uint32_t reg;
-
-	/* Disable generating SMI when setting WPD bit. */
-	write32(scs, read32(scs) & ~SMIWPEN);
-	/*
-	 * Enable caching and prefetching in the SPI controller. Disable
-	 * the SMM-only BIOS write and set WPD bit.
-	 */
-	reg = (read32(bcr) & ~SRC_MASK) | SRC_CACHE_PREFETCH | BCR_WPD;
-	reg &= ~EISS;
-	write32(bcr, reg);
-}
 
 static struct chipset_power_state power_state;
 
@@ -158,17 +109,6 @@ void mainboard_romstage_entry(void)
 	int prev_sleep_state;
 	struct mrc_params mp;
 
-	program_base_addresses();
-
-	tco_disable();
-
-	if (CONFIG(ENABLE_BUILTIN_COM1))
-		byt_config_com1_and_enable();
-
-	console_init();
-
-	spi_init();
-
 	set_max_freq();
 
 	punit_init();

src/soc/intel/baytrail/romstage/uart.c

@@ -1,34 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2013 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <device/pci_ops.h>
-#include <soc/gpio.h>
-#include <soc/iomap.h>
-#include <soc/lpc.h>
-#include <soc/pci_devs.h>
-#include <soc/romstage.h>
-
-void byt_config_com1_and_enable(void)
-{
-	uint32_t reg;
-
-	/* Enable the UART hardware for COM1. */
-	reg = 1;
-	pci_write_config32(PCI_DEV(0, LPC_DEV, 0), UART_CONT, reg);
-
-	/* Set up the pads to select the UART function */
-	score_select_func(UART_RXD_PAD, 1);
-	score_select_func(UART_TXD_PAD, 1);
-}