RPiCode modified by yuanhy0055

yuanhy0055 — Wed, 18 Sep 2024 12:57:40 -0000

--- v3
+++ v4
@@ -1,7 +1,18 @@
+### Pi Boot Rom
 ~~~
 strings bootcode.bin | grep BOOT_UART
 sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin
 ~~~
+### Boot From TF-SD
+~~~
+setenv fdtfile bcm2709-rpi-2-b.dtb
+mmc dev 0
+fatload mmc 0:1 ${kernel_addr_r} zImage
+fatload mmc 0:1 ${fdt_addr_r} bcm2709-rpi-2-b.dtb
+setenv bootargs earlyprintk console=ttyAMA0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
+bootz ${kernel_addr_r} - ${fdt_addr_r}
+~~~
+
 [u-boot:启动详细的代码调用流程](https://blog.csdn.net/Wang_XB_3434/article/details/130979224)
  u-boot.lds:(arch/arm/cpu/u-boot.lds)

RPiCode modified by yuanhy0055

yuanhy0055 — Sat, 07 Sep 2024 01:21:11 -0000

--- v2
+++ v3
@@ -2,8 +2,8 @@
 strings bootcode.bin | grep BOOT_UART
 sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin
 ~~~
+[u-boot:启动详细的代码调用流程](https://blog.csdn.net/Wang_XB_3434/article/details/130979224)
 -u-boot:启动详细的代码调用流程
 u-boot.lds:(arch/arm/cpu/u-boot.lds)
     |-->_start:(arch/arm/lib/vectors.S)
         |-->reset(arch/arm/cpu/armv7/start.S)

RPiCode modified by yuanhy0055

yuanhy0055 — Sat, 07 Sep 2024 01:19:45 -0000

--- v1
+++ v2
@@ -2,3 +2,126 @@
 strings bootcode.bin | grep BOOT_UART
 sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin
 ~~~
++u-boot:启动详细的代码调用流程
+u-boot.lds:(arch/arm/cpu/u-boot.lds)
+    |-->_start:(arch/arm/lib/vectors.S)
+        |-->reset(arch/arm/cpu/armv7/start.S)    
+            |-->save_boot_params(arch/arm/cpu/armv7/start.S)/*将引导参数保存到内存中*/
+                |-->save_boot_params_ret(arch/arm/cpu/armv7/start.S)
+                    |-->cpu_init_cp15(arch/arm/cpu/armv7/start.S)/*初始化*/
+                    |-->cpu_init_crit(arch/arm/cpu/armv7/start.S)
+                        |-->lowlevel_init(arch/arm/cpu/armv7/lowlevel_init.S)
+                    |-->_main(arch/arm/lib/crt0.S)
+                        |-->board_init_f_alloc_reserve(common/init/board_init.c)/*为u-boot的gd结构体分配空间*/
+                        |-->board_init_f_init_reserve(common/init/board_init.c)    /*将gd结构体清零*/
+                        |-->board_init_f(common/board_f.c)
+                            |-->initcall_run_list(include/initcall.h)    /*初始化序列函数*/
+                                |-->init_sequence_f[](common/board_f.c)    /* 初始化序列函数数组 */
+                                    |-->board_early_init_f(board/freescale/mx6ull_toto/mx6ull_toto.c)/*初始化串口的IO配置*/
+                                    |-->timer_init(arch/arm/imx-common/timer.c)    /*初始化内核定时器，为uboot提供时钟节拍*/
+                                    |-->init_baud_rate(common/board_f.c)        /*初始化波特率*/
+                                    |-->serial_init(drivers/serial/serial.c)    /*初始化串口通信设置*/
+                                    |-->console_init_f(common/console.c)        /*初始化控制台*/
+                                    |-->...
+                        |-->relocate_code(arch/arm/lib/relocate.S)    /*主要完成镜像拷贝和重定位*/
+                        |-->relocate_vectors(arch/arm/lib/relocate.S)/*重定位向量表*/
+                        |-->board_init_r(common/board_r.c)/*板级初始化*/
+                            |-->initcall_run_list(include/initcall.h)/*初始化序列函数*/
+                                |-->init_sequence_r[](common/board_f.c)/*序列函数*/
+                                    |-->initr_reloc(common/board_r.c)    /*设置 gd->flags,标记重定位完成*/
+                                    |-->serial_initialize(drivers/serial/serial-uclass.c)/*初始化串口*/
+                                        |-->serial_init(drivers/serial/serial-uclass.c)     /*初始化串口*/
+                                    |-->initr_mmc(common/board_r.c)                         /*初始化emmc*/
+                                        |-->mmc_initialize(drivers/mmc/mmc.c)
+                                            |-->mmc_do_preinit(drivers/mmc/mmc.c)
+                                                |-->mmc_start_init(drivers/mmc/mmc.c)
+                                    |-->console_init_r(common/console.c)                /*初始化控制台*/
+                                    |-->interrupt_init(arch/arm/lib/interrupts.c)        /*初始化中断*/
+                                    |-->initr_net(common/board_r.c)                        /*初始化网络设备*/
+                                        |-->eth_initialize(net/eth-uclass.c)
+                                            |-->eth_common_init(net/eth_common.c)
+                                                |-->phy_init(drivers/net/phy/phy.c)
+                                            |-->uclass_first_device_check(drivers/core/uclass.c)
+                                                |-->uclass_find_first_device(drivers/core/uclass.c)
+                                                |-->device_probe(drivers/core/device.c)
+                                                    |-->device_of_to_plat(drivers/core/device.c)
+                                                        |-->drv->of_to_plat
+                                                            |-->fecmxc_of_to_plat(drivers/net/fec_mxc.c)/*解析设备树信息*/
+                                                    |-->device_get_uclass_id(drivers/core/device.c)
+                                                    |-->uclass_pre_probe_device(drivers/core/uclass.c)
+                                                    |-->drv->probe(dev)
+                                                        /*drivers/net/fec_mxc.c*/
+                                                        U_BOOT_DRIVER(fecmxc_gem) = {
+                                                            .name    = "fecmxc",
+                                                            .id    = UCLASS_ETH,
+                                                            .of_match = fecmxc_ids,
+                                                            .of_to_plat = fecmxc_of_to_plat,
+                                                            .probe    = fecmxc_probe,
+                                                            .remove    = fecmxc_remove,
+                                                            .ops    = &fecmxc_ops,
+                                                            .priv_auto    = sizeof(struct fec_priv),
+                                                            .plat_auto    = sizeof(struct eth_pdata),
+                                                        };
+                                                        |-->fecmxc_probe(drivers/net/fec_mxc.c)/*探测和初始化*/
+                                                            |-->fec_get_miibus(drivers/net/fec_mxc.c)
+                                                                |-->mdio_alloc(drivers/net/fec_mxc.c)
+                                                                |-->bus->read = fec_phy_read;
+                                                                |-->bus->write = fec_phy_write;
+                                                                |-->mdio_register(common/miiphyutil.c)
+                                                                |-->fec_mii_setspeed(drivers/net/fec_mxc.c)
+                                                            |-->fec_phy_init(drivers/net/fec_mxc.c)
+                                                                |-->device_get_phy_addr(drivers/net/fec_mxc.c)
+                                                                |-->phy_connect(drivers/net/phy/phy.c)
+                                                                    |-->phy_find_by_mask(drivers/net/phy/phy.c)
+                                                                        |-->bus->reset(bus)
+                                                                        |-->get_phy_device_by_mask(drivers/net/phy/phy.c)
+                                                                            |-->create_phy_by_mask(drivers/net/phy/phy.c)
+                                                                                |-->phy_device_create(drivers/net/phy/phy.c)
+                                                                                    |-->phy_probe(drivers/net/phy/phy.c)
+                                                                    |-->phy_connect_dev(drivers/net/phy/phy.c)
+                                                                        |-->phy_reset(drivers/net/phy/phy.c)
+                                                                |-->phy_config(drivers/net/phy/phy.c)
+                                                                    |-->board_phy_config(drivers/net/phy/phy.c)
+                                                                        |-->phydev->drv->config(phydev)
+                                                                            /*drivers/net/phy/smsc.c*/
+                                                                            static struct phy_driver lan8710_driver = {
+                                                                                .name = "SMSC LAN8710/LAN8720",
+                                                                                .uid = 0x0007c0f0,
+                                                                                .mask = 0xffff0,
+                                                                                .features = PHY_BASIC_FEATURES,
+                                                                                .config = &genphy_config_aneg,
+                                                                                .startup = &genphy_startup,
+                                                                                .shutdown = &genphy_shutdown,
+                                                                            };
+                                                                            |-->genphy_config_aneg(drivers/net/phy/phy.c)
+                                                                                |-->phy_reset(需要手动调用)(drivers/net/phy/phy.c)
+                                                                                |-->genphy_setup_forced(drivers/net/phy/phy.c)
+                                                                                |-->genphy_config_advert(drivers/net/phy/phy.c)
+                                                                                |-->genphy_restart_aneg(drivers/net/phy/phy.c)
+                                                    |-->uclass_post_probe_device(drivers/core/uclass.c)
+                                                        |-->uc_drv->post_probe(drivers/core/uclass.c)
+                                                            /*net/eth-uclass.c*/
+                                                            UCLASS_DRIVER(ethernet) = {
+                                                                .name        = "ethernet",
+                                                                .id        = UCLASS_ETH,
+                                                                .post_bind    = eth_post_bind,
+                                                                .pre_unbind    = eth_pre_unbind,
+                                                                .post_probe    = eth_post_probe,
+                                                                .pre_remove    = eth_pre_remove,
+                                                                .priv_auto    = sizeof(struct eth_uclass_priv),
+                                                                .per_device_auto    = sizeof(struct eth_device_priv),
+                                                                .flags        = DM_UC_FLAG_SEQ_ALIAS,
+                                                            };
+                                                            |-->eth_post_probe(net/eth-uclass.c)
+                                                                |-->eth_write_hwaddr(drivers/core/uclass.c)
+                                    |-->...
+                                    |-->run_main_loop(common/board_r.c)/*主循环，处理命令*/
+                                        |-->main_loop(common/main.c)
+                                            |-->bootdelay_process(common/autoboot.c)    /*读取环境变量bootdelay和bootcmd的内容*/
+                                            |-->autoboot_command(common/autoboot.c)        /*倒计时按下执行，没有操作执行bootcmd的参数*/
+                                                |-->abortboot(common/autoboot.c)
+                                                    |-->printf("Hit any key to stop autoboot: %2d ", bootdelay);
+                                                    /*到这里就是我们看到uboot延时3s启动内核的地方*/
+                                            |-->cli_loop(common/cli.c)    /*倒计时按下space键,执行用户输入命令*/
+

RPiCode modified by yuanhy0055

yuanhy0055 — Fri, 06 Sep 2024 05:17:23 -0000

strings bootcode.bin | grep BOOT_UART
sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin

Recent changes to RPiCode

RPiCode modified by yuanhy0055

RPiCode modified by yuanhy0055

RPiCode modified by yuanhy0055

RPiCode modified by yuanhy0055