mtk-lk/lib/plat_dbg_info/plat_dbg_info.c

/* Copyright Statement:
*
* This software/firmware and related documentation ("MediaTek Software") are
* protected under relevant copyright laws. The information contained herein
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*/
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* The following software/firmware and/or related documentation ("MediaTek Software")
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*/

#include <platform/boot_mode.h>
#include <libfdt.h>
#include <debug.h>

extern BOOT_ARGUMENT *g_boot_arg;

unsigned int get_dbg_info_base(unsigned int key)
{
	unsigned int i;

	for (i = 0; i < g_boot_arg->plat_dbg_info_max; i++) {
		if (g_boot_arg->plat_dbg_info[i].key == key)
			return g_boot_arg->plat_dbg_info[i].base;
	}

	return 0;
}

unsigned int get_dbg_info_size(unsigned int key)
{
	unsigned int i;

	for (i = 0; i < g_boot_arg->plat_dbg_info_max; i++) {
		if (g_boot_arg->plat_dbg_info[i].key == key)
			return g_boot_arg->plat_dbg_info[i].size;
	}

	return 0;
}

int set_fdt_dbg_info(void *fdt)
{
	int ret = 0;
	int offset;
	unsigned int i;
	unsigned int max;
	unsigned int key[INFO_TYPE_MAX];
	unsigned int base[INFO_TYPE_MAX];
	unsigned int size[INFO_TYPE_MAX];

	if (!fdt)
		return -1;

	offset = fdt_path_offset(fdt, "/chosen");
	if (offset < 0)
		return offset;

	if (g_boot_arg->plat_dbg_info_max > INFO_TYPE_MAX)
		dprintf(CRITICAL,"[PLAT DBG INFO] too many bootargs!\n");
	max = cpu_to_fdt32(INFO_TYPE_MAX);

	for (i = 0; i < g_boot_arg->plat_dbg_info_max; i++) {
		key[i] = cpu_to_fdt32(g_boot_arg->plat_dbg_info[i].key);
		base[i] = cpu_to_fdt32(get_dbg_info_base(g_boot_arg->plat_dbg_info[i].key));
		size[i] = cpu_to_fdt32(get_dbg_info_size(g_boot_arg->plat_dbg_info[i].key));
	}

	for (i = g_boot_arg->plat_dbg_info_max; i < INFO_TYPE_MAX; i++) {
		key[i] = cpu_to_fdt32(0);
		base[i] = cpu_to_fdt32(0);
		size[i] = cpu_to_fdt32(0);
	}

	/* pass info type max to kernel */
	ret = fdt_setprop(fdt, offset, "plat_dbg_info,max", &max, sizeof(max));
	if (ret < 0)
		return ret;

	/* pass key to kernel */
	ret = fdt_setprop(fdt, offset, "plat_dbg_info,key", key, sizeof(key));
	if (ret < 0)
		return ret;

	/* pass base address to kernel */
	ret = fdt_setprop(fdt, offset, "plat_dbg_info,base", base, sizeof(base));
	if (ret < 0)
		return ret;

	/* pass size to kernel */
	ret = fdt_setprop(fdt, offset, "plat_dbg_info,size", size, sizeof(size));

	return ret;
}