【ARM】S5PV210 chip boot process-EEWORLD

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The thoughts of the designers of S5PV210 chip

(1) After the chip is started, the contents of iRom (BL0) are executed to initialize peripherals such as the clock and watchdog, and BL1 and BL2 are copied to the on-chip SRAM;

(2) Jump to the on-chip SRAM for execution, complete the initialization of the external SDRAM, and copy the OS from the storage device to the SDRAM;

(3) Jump to the start code of the OS in SRAM.

Due to the size limitation of U-BOOT, it is impossible to copy all of them to the SRAM on the chip, so the designer of U-BOOT designed the following process

(1) After the chip is started, the contents of iRom (BL0) are executed to initialize peripherals such as the clock and watchdog, and BL1 is copied to the on-chip SRAM;

(2) Jump to the on-chip SRAM for execution, complete the SDRAM initialization, copy BL2 to the SDRAM, and execute.

(3) Jump to BL2 in SDRAM for execution, copy the OS to SDRAM, and jump to the starting position of the OS to execute the OS.

Keywords：ARM Reference address：【ARM】S5PV210 chip boot process

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