X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Fcommon%2Fenv_dataflash.c;fp=qemu%2Froms%2Fu-boot%2Fcommon%2Fenv_dataflash.c;h=034e3231693e3b751dc41f6e181a9672f03d6540;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/u-boot/common/env_dataflash.c b/qemu/roms/u-boot/common/env_dataflash.c new file mode 100644 index 000000000..034e32316 --- /dev/null +++ b/qemu/roms/u-boot/common/env_dataflash.c @@ -0,0 +1,84 @@ +/* + * LowLevel function for DataFlash environment support + * Author : Gilles Gastaldi (Atmel) + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +env_t *env_ptr; + +char *env_name_spec = "dataflash"; + +uchar env_get_char_spec(int index) +{ + uchar c; + + read_dataflash(CONFIG_ENV_ADDR + index + offsetof(env_t, data), + 1, (char *)&c); + return c; +} + +void env_relocate_spec(void) +{ + ulong crc, new = 0; + unsigned off; + char buf[CONFIG_ENV_SIZE]; + + /* Read old CRC */ + read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc), + sizeof(ulong), (char *)&crc); + + /* Read whole environment */ + read_dataflash(CONFIG_ENV_ADDR, CONFIG_ENV_SIZE, buf); + + /* Calculate the CRC */ + off = offsetof(env_t, data); + new = crc32(new, (unsigned char *)(buf + off), ENV_SIZE); + + if (crc == new) + env_import(buf, 1); + else + set_default_env("!bad CRC"); +} + +#ifdef CONFIG_ENV_OFFSET_REDUND +#error No support for redundant environment on dataflash yet! +#endif + +int saveenv(void) +{ + env_t env_new; + int ret; + + ret = env_export(&env_new); + if (ret) + return ret; + + return write_dataflash(CONFIG_ENV_ADDR, + (unsigned long)&env_new, + CONFIG_ENV_SIZE); +} + +/* + * Initialize environment use + * + * We are still running from ROM, so data use is limited. + * Use a (moderately small) buffer on the stack + */ +int env_init(void) +{ + /* use default */ + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 1; + + return 0; +}