Hi, I am Juan Alfonso Reyes, a firmware engineer in GMV. Currently we are developing new boards based in Apollo Lake CPU. We are trying to load uboot from UEFI. Using the default qemu-x86_efi_payload64_defconfig we are getting "U-Boot EFI Payload 2002 No memory map" error code. As I can see in the code 2002 means (efi_stub.c):
ret = boot->get_memory_map(&size, NULL, &key, &desc_size, &version); if (ret != EFI_BUFFER_TOO_SMALL) { printhex2(BITS_PER_LONG); printhex2(ret); puts(" No memory map\n"); while(1); return ret; }
0x20 -> BITS_PER_LONG 32bits 0x02 -> EFI_INVALID_PARAMETER
32bits sounds weird for me, so I changed config to use CONFIG_X86_RUN_64BIT instead of CONFIG_X86_RUN_32BIT. I have changed it and I got a compilation error:
In file included from include/common.h:53:0, from cmd/efi.c:8: cmd/efi.c: In function 'do_efi_mem': ./arch/x86/include/asm/global_data.h:117:12: error: 'global_data_ptr' undeclared (first use in this function) #define gd global_data_ptr
I have surfed in the code and I have found this in ./arch/x86/include/asm/global_data.h
# if defined(CONFIG_EFI_APP) || CONFIG_IS_ENABLED(X86_64) /* TODO(sjg@chromium.orgmailto:sjg@chromium.org): Consider using a fixed register for gd on x86_64 */ #define gd global_data_ptr
What do you mean with "Consider using a fixed register for gd" ?Can you help us to make this work? Are we in the correct direction?
Thank you very much,
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Juan Alfonso Reyes Ajenjo Ingeniero en Informatica / Computer Systems Engineer Ingeniero en Automática y Electrónica Industrial / Automation and Industrial Electronics Engineer
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