[coreboot-gerrit] Change in coreboot[master]: arch/x86: Implement cpu_info in C code

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans.
Hello Arthur Heymans,

I'd like you to do a code review. Please visit

https://review.coreboot.org/c/coreboot/+/57049

to review the following change.

Change subject: arch/x86: Implement cpu_info in C code
......................................................................

arch/x86: Implement cpu_info in C code

Change-Id: Ic7396b8429e29739e18a189dacea3a76e571cd58
Signed-off-by: Arthur Heymans 
---
M src/arch/x86/include/arch/cpu.h
1 file changed, 5 insertions(+), 14 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/57049/1

diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h
index 3fd4c1b..a40b9b4 100644
--- a/src/arch/x86/include/arch/cpu.h
+++ b/src/arch/x86/include/arch/cpu.h
@@ -233,20 +233,11 @@

static inline struct cpu_info *cpu_info(void)
 {
-	struct cpu_info *ci;
-	__asm__(
-#if ENV_X86_64
-		"and %%rsp,%0; "
-		"or  %2, %0 "
-#else
-		"andl %%esp,%0; "
-		"orl  %2, %0 "
-#endif
-		: "=r" (ci)
-		: "0" (~(CONFIG_STACK_SIZE - 1)),
-		"r" (CONFIG_STACK_SIZE - sizeof(struct cpu_info))
-	);
-	return ci;
+	char s;
+	uintptr_t stack = (uintptr_t)&s;
+	stack &= ~(CONFIG_STACK_SIZE - 1);
+	stack |= (CONFIG_STACK_SIZE - sizeof(struct cpu_info));
+	return (struct cpu_info *)stack;
 }

struct cpuinfo_x86 {