api: Add FreeBSD API support for MIPS platforms

This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms.

Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>

api/Makefile

@@ -7,3 +7,4 @@
 obj-y += api.o api_display.o api_net.o api_storage.o
 obj-$(CONFIG_ARM) += api_platform-arm.o
 obj-$(CONFIG_PPC) += api_platform-powerpc.o
+obj-$(CONFIG_MIPS) += api_platform-mips.o

api/api_platform-mips.c

@@ -0,0 +1,32 @@
+/*
+ * (C) Copyright 2007 Stanislav Galabov <sgalabov@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * This file contains routines that fetch data from bd_info sources
+ */
+
+#include <config.h>
+#include <linux/types.h>
+#include <api_public.h>
+
+#include <asm/u-boot.h>
+#include <asm/global_data.h>
+
+#include "api_private.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Important notice: handling of individual fields MUST be kept in sync with
+ * include/asm-generic/u-boot.h, so any changes
+ * need to reflect their current state and layout of structures involved!
+ */
+int platform_sys_info(struct sys_info *si)
+{
+
+	platform_set_mr(si, gd->bd->bi_memstart,
+			gd->bd->bi_memsize, MR_ATTR_DRAM);
+
+	return 1;
+}

examples/api/Makefile

@@ -10,6 +10,9 @@ endif
 ifeq ($(ARCH),arm)
 LOAD_ADDR = 0x1000000
 endif
+ifeq ($(ARCH),mips)
+LOAD_ADDR = 0x80200000
+endif
 
 # Resulting ELF and binary exectuables will be named demo and demo.bin
 extra-y = demo

examples/api/crt0.S

@@ -40,6 +40,30 @@ syscall:
 	ldr	ip, =syscall_ptr
 	ldr	pc, [ip]
 
+#elif defined(CONFIG_MIPS)
+	.text
+	.globl __start
+	.ent __start
+__start:
+	sw	$sp, search_hint
+	b	main
+	.end __start
+
+	.globl syscall
+	.ent syscall
+syscall:
+	sw	$ra, return_addr
+	lw	$t9, syscall_ptr
+	jalr	$t9
+	nop
+	lw	$ra, return_addr
+	jr	$ra
+	nop
+	.end syscall
+
+return_addr:
+	.align 4
+	.long 0
 #else
 #error No support for this arch!
 #endif