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#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/mtk_ram_console.h>
#include <asm/system_misc.h>
#include <asm/traps.h>
#include <asm/signal.h>
#include <mach/sync_write.h>
#include "../systracker.h"
#ifdef SYSTRACKER_TEST_SUIT
void __iomem *p1;
void __iomem *mm_area1;
#endif
#ifdef CONFIG_ARM64
static int read_timeout_handler(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
int i = 0;
#ifdef SYSTRACKER_TEST_SUIT
systracker_test_cleanup();
#endif
pr_notice("%s:%d: read timeout\n", __func__, __LINE__);
aee_dump_backtrace(regs, NULL);
if(readl(IOMEM(BUS_DBG_CON)) & BUS_DBG_CON_IRQ_AR_STA){
for(i = 0; i < BUS_DBG_NUM_TRACKER; i++){
pr_err("AR_TRACKER Timeout Entry[%d]: ReadAddr:0x%x, Length:0x%x, TransactionID:0x%x!\n",
i, readl(IOMEM(BUS_DBG_AR_TRACK_L(i))), readl(IOMEM(BUS_DBG_AR_TRACK_H(i))), readl(IOMEM(BUS_DBG_AR_TRANS_TID(i))));
}
}
/* return -1 to indicate kernel go on its flow */
return -1;
}
static void write_timeout_handler(struct pt_regs *regs, void *priv)
{
int i = 0;
#ifdef SYSTRACKER_TEST_SUIT
systracker_test_cleanup();
#endif
pr_notice("%s:%d: write timeout\n", __func__, __LINE__);
aee_dump_backtrace(regs, NULL);
if(readl(IOMEM(BUS_DBG_CON)) & BUS_DBG_CON_IRQ_AW_STA){
for(i = 0; i < BUS_DBG_NUM_TRACKER; i++){
pr_err("AW_TRACKER Timeout Entry[%d]: WriteAddr:0x%x, Length:0x%x, TransactionID:0x%x!\n",
i, readl(IOMEM(BUS_DBG_AW_TRACK_L(i))), readl(IOMEM(BUS_DBG_AW_TRACK_H(i))), readl(IOMEM(BUS_DBG_AW_TRANS_TID(i))));
}
}
}
static int systracker_platform_hook_fault(void)
{
int ret = 0;
/* We use ARM64's synchroneous external abort for read timeout */
hook_fault_code(0x10, read_timeout_handler, SIGTRAP, 0, "Systracker debug exception");
/* for 64bit, we should register async abort handler */
ret = register_async_abort_handler(write_timeout_handler, NULL);
if (ret) {
pr_warn("%s:%d: register_async_abort_handler failed\n", __func__, __LINE__);
return -1;
}
return 0;
}
#else
int systracker_handler(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
int i;
#ifdef SYSTRACKER_TEST_SUIT
writel(readl(p1) & ~(0x1 << 6), p1);
#endif
aee_dump_backtrace(regs, NULL);
if (readl(IOMEM(BUS_DBG_CON)) & BUS_DBG_CON_IRQ_AR_STA){
for(i = 0; i < BUS_DBG_NUM_TRACKER; i++){
printk(KERN_ALERT "AR_TRACKER Timeout Entry[%d]: ReadAddr:0x%x, Length:0x%x, TransactionID:0x%x!\n",
i, readl(IOMEM(BUS_DBG_AR_TRACK_L(i))), readl(IOMEM(BUS_DBG_AR_TRACK_H(i))), readl(IOMEM(BUS_DBG_AR_TRANS_TID(i))));
}
}
if (readl(IOMEM(BUS_DBG_CON)) & BUS_DBG_CON_IRQ_AW_STA){
for(i = 0; i < BUS_DBG_NUM_TRACKER; i++){
printk(KERN_ALERT "AW_TRACKER Timeout Entry[%d]: WriteAddr:0x%x, Length:0x%x, TransactionID:0x%x!\n",
i, readl(IOMEM(BUS_DBG_AW_TRACK_L(i))), readl(IOMEM(BUS_DBG_AW_TRACK_H(i))), readl(IOMEM(BUS_DBG_AW_TRANS_TID(i))));
}
}
return -1;
}
//ARM32 version
static int systracker_platform_hook_fault(void)
{
#ifdef CONFIG_ARM_LPAE
hook_fault_code(0x10, systracker_handler, SIGTRAP, 0, "Systracker debug exception");
hook_fault_code(0x11, systracker_handler, SIGTRAP, 0, "Systracker debug exception");
#else
hook_fault_code(0x8, systracker_handler, SIGTRAP, 0, "Systracker debug exception");
hook_fault_code(0x16, systracker_handler, SIGTRAP, 0, "Systracker debug exception");
#endif
return 0;
}
#endif
#ifdef SYSTRACKER_TEST_SUIT
void __iomem *p1;
void __iomem *mm_area1;
static int systracker_platform_test_init(void)
{
p1 = ioremap(0x10001220, 0x4);
//use mmsys reg base for our test
mm_area1 = ioremap(0x14000000, 0x4);
return 0;
}
static void systracker_platform_test_cleanup(void)
{
writel(readl(p1) & ~(0x1 << 6), p1);
}
static void systracker_platform_wp_test(void)
{
void __iomem *ptr;
//use eint reg base as our watchpoint
ptr = ioremap(0x1000b000, 0x4);
pr_notice("%s:%d: we got p = 0x%p\n", __func__, __LINE__, ptr);
systracker_set_watchpoint_addr(0x1000b000);
systracker_watchpoint_enable();
//touch it
writel(0, ptr);
pr_notice("after we touched watchpoint\n");
iounmap(ptr);
return;
}
static void systracker_platform_read_timeout_test(void)
{
/*FIXME: testing*/
//track_config.enable_slave_err = 0;
//systracker_enable();
writel(readl(p1) | (0x1 << 6), p1);
readl(mm_area1);
writel(readl(p1) & ~(0x1 << 6), p1);
}
static void systracker_platform_write_timeout_test(void)
{
writel(readl(p1) | (0x1 << 6), p1);
writel(0x0, mm_area1);
writel(readl(p1) & ~(0x1 << 6), p1);
}
static void systracker_platform_withrecord_test(void)
{
writel(readl(IOMEM(BUS_DBG_CON)) | BUS_DBG_CON_HALT_ON_EN, IOMEM(BUS_DBG_CON));
writel(readl(p1) | (0x1 << 6), p1);
readl(mm_area1);
#if 0
/* FIXME: related function not ready on FPGA */
wdt_arch_reset(1);
#endif
}
static void systracker_platform_notimeout_test(void)
{
writel(readl(p1) | (0x1 << 6), p1);
//disable timeout
writel(readl(IOMEM(BUS_DBG_CON)) & ~ (BUS_DBG_CON_TIMEOUT_EN), IOMEM(BUS_DBG_CON));
//read it, should cause bus hang
readl(mm_area1);
//never come back
printk("failed??\n");
}
#endif //end of SYSTRACKER_TEST_SUIT
/*
* mt_systracker_init: initialize driver.
* Always return 0.
*/
static int __init mt_systracker_init(void)
{
struct mt_systracker_driver *systracker_drv;
systracker_drv = get_mt_systracker_drv();
systracker_drv->systracker_hook_fault = systracker_platform_hook_fault;
#ifdef SYSTRACKER_TEST_SUIT
systracker_drv->systracker_test_init = systracker_platform_test_init;
systracker_drv->systracker_test_cleanup = systracker_platform_test_cleanup;
systracker_drv->systracker_wp_test = systracker_platform_wp_test;
systracker_drv->systracker_read_timeout_test = systracker_platform_read_timeout_test;
systracker_drv->systracker_write_timeout_test = systracker_platform_write_timeout_test;
systracker_drv->systracker_withrecord_test = systracker_platform_withrecord_test;
systracker_drv->systracker_notimeout_test = systracker_platform_notimeout_test;
#endif
return 0;
}
arch_initcall(mt_systracker_init);
MODULE_DESCRIPTION("system tracker driver v2.0");
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