boston: Introduce support for the MIPS Boston development board
This patch introduces support for building U-Boot to run on the MIPS
Boston development board. This is a board built around an FPGA & an
Intel EG20T Platform Controller Hub, used largely as part of the
development of new CPUs and their software support. It is essentially
the successor to the older MIPS Malta board.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
diff --git a/board/imgtec/boston/Kconfig b/board/imgtec/boston/Kconfig
new file mode 100644
index 0000000..ab76a3c
--- /dev/null
+++ b/board/imgtec/boston/Kconfig
@@ -0,0 +1,16 @@
+if TARGET_BOSTON
+
+config SYS_BOARD
+ default "boston"
+
+config SYS_VENDOR
+ default "imgtec"
+
+config SYS_CONFIG_NAME
+ default "boston"
+
+config SYS_TEXT_BASE
+ default 0x9fc00000 if 32BIT
+ default 0xffffffff9fc00000 if 64BIT
+
+endif
diff --git a/board/imgtec/boston/MAINTAINERS b/board/imgtec/boston/MAINTAINERS
new file mode 100644
index 0000000..30dd481
--- /dev/null
+++ b/board/imgtec/boston/MAINTAINERS
@@ -0,0 +1,6 @@
+BOSTON BOARD
+M: Paul Burton <paul.burton@imgtec.com>
+S: Maintained
+F: board/imgtec/boston/
+F: include/configs/boston.h
+F: configs/boston_defconfig
diff --git a/board/imgtec/boston/Makefile b/board/imgtec/boston/Makefile
new file mode 100644
index 0000000..deda457
--- /dev/null
+++ b/board/imgtec/boston/Makefile
@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2016 Imagination Technologies
+#
+# SPDX-License-Identifier: GPL-2.0
+#
+
+obj-y += checkboard.o
+obj-y += ddr.o
+obj-y += lowlevel_init.o
diff --git a/board/imgtec/boston/boston-lcd.h b/board/imgtec/boston/boston-lcd.h
new file mode 100644
index 0000000..9f5c1b9
--- /dev/null
+++ b/board/imgtec/boston/boston-lcd.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __BOARD_BOSTON_LCD_H__
+#define __BOARD_BOSTON_LCD_H__
+
+/**
+ * lowlevel_display() - Display a message on Boston's LCD
+ * @msg: The string to display
+ *
+ * Display the string @msg on the 7 character LCD display of the Boston board.
+ * This is typically used for debug or to present some form of status
+ * indication to the user, allowing faults to be identified when things go
+ * wrong early enough that the UART isn't up.
+ */
+void lowlevel_display(const char msg[static 8]);
+
+#endif /* __BOARD_BOSTON_LCD_H__ */
diff --git a/board/imgtec/boston/boston-regs.h b/board/imgtec/boston/boston-regs.h
new file mode 100644
index 0000000..b9dfbb4
--- /dev/null
+++ b/board/imgtec/boston/boston-regs.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __BOARD_BOSTON_REGS_H__
+#define __BOARD_BOSTON_REGS_H__
+
+#include <asm/addrspace.h>
+
+#define BOSTON_PLAT_BASE CKSEG1ADDR(0x17ffd000)
+#define BOSTON_LCD_BASE CKSEG1ADDR(0x17fff000)
+
+/*
+ * Platform Register Definitions
+ */
+#define BOSTON_PLAT_CORE_CL (BOSTON_PLAT_BASE + 0x04)
+
+#define BOSTON_PLAT_DDR3STAT (BOSTON_PLAT_BASE + 0x14)
+# define BOSTON_PLAT_DDR3STAT_CALIB (1 << 2)
+
+#define BOSTON_PLAT_DDRCONF0 (BOSTON_PLAT_BASE + 0x38)
+# define BOSTON_PLAT_DDRCONF0_SIZE (0xf << 0)
+
+#endif /* __BOARD_BOSTON_REGS_H__ */
diff --git a/board/imgtec/boston/checkboard.c b/board/imgtec/boston/checkboard.c
new file mode 100644
index 0000000..93eae7f
--- /dev/null
+++ b/board/imgtec/boston/checkboard.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+
+#include "boston-lcd.h"
+#include "boston-regs.h"
+
+int checkboard(void)
+{
+ u32 changelist;
+
+ lowlevel_display("U-boot ");
+
+ printf("Board: MIPS Boston\n");
+
+ printf("CPU: 0x%08x", read_c0_prid());
+ changelist = __raw_readl((uint32_t *)BOSTON_PLAT_CORE_CL);
+ if (changelist > 1)
+ printf(" cl%x", changelist);
+ putc('\n');
+
+ return 0;
+}
diff --git a/board/imgtec/boston/ddr.c b/board/imgtec/boston/ddr.c
new file mode 100644
index 0000000..ceffef6
--- /dev/null
+++ b/board/imgtec/boston/ddr.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+
+#include <asm/io.h>
+
+#include "boston-regs.h"
+
+phys_size_t initdram(int board_type)
+{
+ u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);
+
+ return (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) << 30;
+}
+
+ulong board_get_usable_ram_top(ulong total_size)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) {
+ /* 2GB wrapped around to 0 */
+ return CKSEG0ADDR(256 << 20);
+ }
+
+ return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));
+}
diff --git a/board/imgtec/boston/lowlevel_init.S b/board/imgtec/boston/lowlevel_init.S
new file mode 100644
index 0000000..0c01aa9
--- /dev/null
+++ b/board/imgtec/boston/lowlevel_init.S
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <config.h>
+
+#include <asm/addrspace.h>
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+
+#include "boston-regs.h"
+
+.data
+
+msg_ddr_cal: .ascii "DDR Cal "
+msg_ddr_ok: .ascii "DDR OK "
+
+.text
+
+LEAF(lowlevel_init)
+ move s0, ra
+
+ PTR_LA a0, msg_ddr_cal
+ bal lowlevel_display
+
+ PTR_LI t0, BOSTON_PLAT_DDR3STAT
+1: lw t1, 0(t0)
+ andi t1, t1, BOSTON_PLAT_DDR3STAT_CALIB
+ beqz t1, 1b
+
+ PTR_LA a0, msg_ddr_ok
+ bal lowlevel_display
+
+ move v0, zero
+ jr s0
+ END(lowlevel_init)
+
+LEAF(lowlevel_display)
+ .set push
+ .set noat
+ PTR_LI AT, BOSTON_LCD_BASE
+#ifdef CONFIG_64BIT
+ ld k1, 0(a0)
+ sd k1, 0(AT)
+#else
+ lw k1, 0(a0)
+ sw k1, 0(AT)
+ lw k1, 4(a0)
+ sw k1, 4(AT)
+#endif
+ .set pop
+1: jr ra
+ END(lowlevel_display)