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Diffstat (limited to 'qemu/roms/u-boot/doc/README.s5pc1xx')
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diff --git a/qemu/roms/u-boot/doc/README.s5pc1xx b/qemu/roms/u-boot/doc/README.s5pc1xx new file mode 100644 index 000000000..ab1f02469 --- /dev/null +++ b/qemu/roms/u-boot/doc/README.s5pc1xx @@ -0,0 +1,72 @@ + +Summary +======= + +This README is about U-Boot support for SAMSUNG's ARM Cortex-A8 based S5PC1xx +family of SoCs (S5PC100 [1] and S5PC110). + +Currently the following board is supported: + +* SMDKC100 [2] + +Toolchain +========= + +While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile +with -march=armv5 to allow more compilers to work. For U-Boot code this has +no performance impact. + +Build +===== + +* SMDKC100 + +make smdkc100_config +make + + +Interfaces +========== + +cpu + +To check SoC: + + if (cpu_is_s5pc100()) + printf("cpu is s5pc100\n"); + + or + + if (cpu_is_s5pc110()) + printf("cpu is s5pc110\n"); + +gpio + + struct s5pc100_gpio *gpio = (struct s5pc100_gpio*)S5PC100_GPIO_BASE; + + /* GPA[0] pin set to irq */ + gpio_cfg_pin(&gpio->gpio_a, 0, GPIO_IRQ); + + /* GPA[0] pin set to input */ + gpio_direction_input(&gpio->gpio_a, 0); + + /* GPA[0] pin set to output/high */ + gpio_direction_output(&gpio->gpio_a, 0, 1); + + /* GPA[0] value set to low */ + gpio_set_value(&gpio->gpio_a, 0, 0); + + /* get GPA[0] value */ + value = gpio_get_value(&gpio->gpio_a, 0); + +Links +===== + +[1] S5PC100: + +http://www.samsung.com/global/business/semiconductor/productInfo.do? +fmly_id=229&partnum=S5PC100 + +[2] SMDKC100: + +http://meritech.co.kr/eng/products/product_view.php?num=28 |