mirror of
https://github.com/hardkernel/kernel_common_drivers.git
synced 2026-06-25 12:03:48 +09:00
benlong.zhou
2d120bb920
PD#SWPL-237927 Problem: kernel can't get boot log Solution: kernel get boot log that they are blx's log same as below CL https://scgit.amlogic.com/#/c/527327/ https://scgit.amlogic.com/#/c/568160/ https://scgit.amlogic.com/#/c/580089/ Verify: s7d_bm201 Change-Id: I786569565b2b5effde66d620e3b9b014ec6f8a2c Signed-off-by: benlong.zhou <benlong.zhou@amlogic.com>
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
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/*
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* Copyright (c) 2025 Amlogic, Inc. All rights reserved.
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*/
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/*
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* Ring Buffer implementation
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*
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*1)
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*head points to first available data byte
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*tail points to first available byte space
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*2)
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*if head==tail && len==0 // empty
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*if head==tail && len==size // full
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*3)
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*if head>=size head%=size
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*if tail>=size tail%=size
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*/
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#ifndef __RING_BUFFER_H__
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#define __RING_BUFFER_H__
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//#include "soc.h"
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#ifndef BIT
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#define BIT(nr) (1 << (nr))
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#endif
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//#define BL30MSG_BUF_BASE (0x40000000 + 0x1000)
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//#define BL30MSG_BUF_BASE (0x2e000000 + 0x1000)
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//#define BL30MSG_BUF_BASE (0x10000000 + (64*1024))
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//#define BL30MSG_BUF_BASE (0xfffc0000 + (24*1024)) /*(0xfffc0000 + (24*1024))=0xfffc6000*/
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//#define BL30MSG_BUF_SIZE (2*1024)
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//#define BL30MSG_LEN 100
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//#define UBOOT_LOG_BUF_BASE (0x8000000 - 0x100000)
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//#define UBOOT_LOG_BUF_SIZE 0X10000
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#define UBOOT_LOG_BUF_BASE (BOOT_LOG_ADDR)
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#define UBOOT_LOG_BUF_SIZE (BOOT_LOG_SIZE)
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#define MAGIC 0x11223344
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#define UBOOT_LOG_INITFLAG 0x54494e49 /*INIT*/
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#define UBOOT_LOG_VER 0X1
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#ifndef NULL
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#define NULL ((void *)0)
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#endif
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#define RISC_V_CPU 0
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#define ARM_CPU 1
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/*
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*1) req is used for request lock
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*2) turn is flag for who should own the lock when they request at same time.
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*/
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struct amp_lock {
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int turn;
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int req[2];
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};
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#define MESSAGE_ALIGN_SIZE 4
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struct ring_buffer {
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unsigned int magic; // magic number
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unsigned int ver;
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unsigned int inited;
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#define LOG_MESSAGE_WRITE BIT(0)
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#define LOG_MESSAGE_READ BIT(1)
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#define LOG_MESSAGE_SECOND_READ BIT(2)
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unsigned int mode;
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struct amp_lock lock; // exclusive lock (implement future)
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unsigned int size; // total size of ring buffer data
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unsigned int head; // for read data offset, arm(kernel) maintain, kernel move it
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unsigned int tail; // for write data offset, risc-v maintain it
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unsigned int len; // available log data in ring buffer
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unsigned int len_b; // available log data for second read
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/* kernel6.12 have add UBSAN check, when define data[4], only 4bytes can be accessed,
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* exceed access 4bytes, there are below error:
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* "Internal error: UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP"
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* so payload data don't be here. increase struct m_rb
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*/
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//char data[4]; // log buffer payload start
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};
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struct m_rb {
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struct ring_buffer *rb;
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char *data;
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};
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#define LOG_MESSAGE_HEADER 0x11121314
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#define MESSAGE_MIN_SIZE (13)
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#define READ_MSG_STATE_IN_PROGRESS 0
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#define READ_MSG_STATE_BEGIN BIT(0)
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#define READ_MSG_STATE_END BIT(1)
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/*log_message_t format is embedded in msg loop buffer */
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struct log_message_t {
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unsigned int message_head; //for find out correct first message after message is loop save
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unsigned int timer;
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unsigned int len; //message valid len
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unsigned char *message; //message 4byte align
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};
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//extern int lock(void);
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//extern int unlock(void);
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int initial_ring_buffer(unsigned char *buffer, unsigned int size);
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unsigned int read_ring_buffer(unsigned int *timer, unsigned char *buffer,
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unsigned int size, unsigned int *msg_state);
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unsigned int bl30_read_ring_buffer(unsigned int *timer, unsigned char *buffer,
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unsigned int size, unsigned int *msg_state);
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void bl30_log_update(unsigned long base_addr, unsigned long size);
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unsigned int write_ring_buffer(unsigned char *buffer, unsigned int size);
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void reset_ring_buffer(void);
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void blx_init_uboot_log(unsigned long base_addr, unsigned long size);
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void bl30_init_log(unsigned long base_addr, unsigned long size);
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void blx_put_char(unsigned char c);
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void second_read_ring_buffer_set(void);
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long get_raw_time_from_timer_e(void);
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#endif
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