mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
synced 2025-12-22 09:11:26 +03:00
7c00563944
Add bootloader debug driver which provides debug functionality from user space. bug 3583607 Change-Id: I8bdd2712e755b370b3e157bcdcd3329122729fea Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2708549 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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#include <linux/types.h>
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/memblock.h>
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#include <asm/page.h>
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phys_addr_t tegra_bl_debug_data_start;
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EXPORT_SYMBOL(tegra_bl_debug_data_start);
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phys_addr_t tegra_bl_debug_data_size;
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EXPORT_SYMBOL(tegra_bl_debug_data_size);
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phys_addr_t tegra_bl_prof_start;
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EXPORT_SYMBOL(tegra_bl_prof_start);
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phys_addr_t tegra_bl_prof_size;
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EXPORT_SYMBOL(tegra_bl_prof_size);
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phys_addr_t tegra_bl_bcp_start;
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EXPORT_SYMBOL(tegra_bl_bcp_start);
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phys_addr_t tegra_bl_bcp_size;
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EXPORT_SYMBOL(tegra_bl_bcp_size);
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#ifndef MODULE
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static int __init tegra_bl_prof_arg(char *option)
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{
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char *p = option;
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tegra_bl_prof_size = memparse(p, &p);
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if (!p)
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return -EINVAL;
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if (*p != '@')
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return -EINVAL;
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tegra_bl_prof_start = memparse(p + 1, &p);
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if (!tegra_bl_prof_size || !tegra_bl_prof_start) {
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tegra_bl_prof_size = 0;
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tegra_bl_prof_start = 0;
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return -ENXIO;
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}
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if (pfn_valid(__phys_to_pfn(tegra_bl_prof_start))) {
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if (memblock_reserve(tegra_bl_prof_start, tegra_bl_prof_size)) {
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pr_err("Failed to reserve bl_prof_data %08llx@%08llx\n",
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(u64)tegra_bl_prof_size,
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(u64)tegra_bl_prof_start);
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tegra_bl_prof_size = 0;
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tegra_bl_prof_start = 0;
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return -ENXIO;
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}
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}
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return 0;
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}
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early_param("bl_prof_dataptr", tegra_bl_prof_arg);
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static int __init tegra_bl_debug_data_arg(char *options)
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{
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char *p = options;
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tegra_bl_debug_data_size = memparse(p, &p);
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if (!p)
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return -EINVAL;
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if (*p != '@')
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return -EINVAL;
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tegra_bl_debug_data_start = memparse(p + 1, &p);
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if (!tegra_bl_debug_data_size || !tegra_bl_debug_data_start) {
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tegra_bl_debug_data_size = 0;
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tegra_bl_debug_data_start = 0;
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return -ENXIO;
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}
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if (pfn_valid(__phys_to_pfn(tegra_bl_debug_data_start))) {
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if (memblock_reserve(tegra_bl_debug_data_start,
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tegra_bl_debug_data_size)) {
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pr_err("Failed to reserve bl_debug_data %08llx@%08llx\n",
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(u64)tegra_bl_debug_data_size,
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(u64)tegra_bl_debug_data_start);
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tegra_bl_debug_data_size = 0;
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tegra_bl_debug_data_start = 0;
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return -ENXIO;
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}
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}
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return 0;
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}
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early_param("bl_debug_data", tegra_bl_debug_data_arg);
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static int tegra_bl_bcp_arg(char *options)
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{
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char *p = options;
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tegra_bl_bcp_size = memparse(p, &p);
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if (!p)
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return -EINVAL;
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if (*p != '@')
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return -EINVAL;
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tegra_bl_bcp_start = memparse(p + 1, &p);
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if (!tegra_bl_bcp_size || !tegra_bl_bcp_start) {
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tegra_bl_bcp_size = 0;
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tegra_bl_bcp_start = 0;
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return -ENXIO;
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}
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if (pfn_valid(__phys_to_pfn(tegra_bl_bcp_start))) {
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if (memblock_reserve(tegra_bl_bcp_start,
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tegra_bl_bcp_size)) {
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pr_err("Failed to reserve boot_cfg_data %08llx@%08llx\n",
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(u64)tegra_bl_bcp_size,
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(u64)tegra_bl_bcp_start);
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tegra_bl_bcp_size = 0;
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tegra_bl_bcp_start = 0;
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return -ENXIO;
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}
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}
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pr_warn("Got boot_cfg_data %08llx@%08llx\n",
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(u64)tegra_bl_bcp_size,
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(u64)tegra_bl_bcp_start);
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return 0;
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}
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early_param("boot_cfg_dataptr", tegra_bl_bcp_arg);
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#else
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#endif
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