cpu: port amd/agesa to 64bit
Change-Id: I8644b04f4b57db5fc95ec155d3f78d53c63c9831
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Signed-off-by: Scott Duplichan <scott@notabs.org>
Reviewed-on: http://review.coreboot.org/10579
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
diff --git a/src/cpu/amd/agesa/cache_as_ram.inc b/src/cpu/amd/agesa/cache_as_ram.inc
index a8dbee8..b19f03b 100644
--- a/src/cpu/amd/agesa/cache_as_ram.inc
+++ b/src/cpu/amd/agesa/cache_as_ram.inc
@@ -64,9 +64,67 @@
cvtsi2sd %ebx, %xmm1
post_code(0xa1)
- AMD_ENABLE_STACK
- post_code(0xa1)
+#ifdef __x86_64__
+ /* switch to 64 bit long mode */
+ .intel_syntax noprefix
+
+ mov ecx, esi
+ add ecx, 0 # core number
+ xor eax, eax
+ lea edi, [ecx+0x1000+0x23]
+ mov dword ptr [ecx+0], edi
+ mov dword ptr [ecx+4], eax
+
+ lea edi, [ecx+0x1000]
+ mov dword ptr [edi+0x00], 0x000000e3
+ mov dword ptr [edi+0x04], eax
+ mov dword ptr [edi+0x08], 0x400000e3
+ mov dword ptr [edi+0x0c], eax
+ mov dword ptr [edi+0x10], 0x800000e3
+ mov dword ptr [edi+0x14], eax
+ mov dword ptr [edi+0x18], 0xc00000e3
+ mov dword ptr [edi+0x1c], eax
+
+ # load rom based identity mapped page tables
+ mov eax, ecx
+ mov cr3,eax
+
+ # enable PAE
+ mov eax, cr4
+ bts eax, 5
+ mov cr4, eax
+
+ # enable long mode
+ mov ecx, 0xC0000080
+ rdmsr
+ bts eax, 8
+ wrmsr
+
+ # enable paging
+ mov eax, cr0
+ bts eax, 31
+ mov cr0, eax
+
+ # use call far to switch to 64-bit code segment
+ jmp 0x18,.+7
+
+ /* Pass the BIST result */
+ cvtsd2si esi, xmm1
+
+ /* Pass the cpu_init_detected */
+ cvtsd2si edi, xmm0
+
+ /* align the stack */
+ and esp, 0xFFFFFFF0
+
+ .code64
+ call cache_as_ram_main
+ .code32
+
+ .att_syntax prefix
+#else
+ AMD_ENABLE_STACK
/* Restore the BIST result */
cvtsd2si %xmm0, %edx
@@ -77,6 +135,7 @@
pushl %ebx /* init detected */
pushl %edx /* bist */
call cache_as_ram_main
+#endif
/* Should never see this postcode */
post_code(0xaf)
@@ -108,3 +167,6 @@
ret
cache_as_ram_setup_out:
+#ifdef __x86_64__
+.code64
+#endif