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arch/ppc64/include/arch/io.h: implement IO functions 

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>

arch/ppc64/include/arch/io.h: use proper instructions for IO operations

Those instrunctions are:
* Load {byte,half,word} and Zero Caching Inhibited indeXed (l*zcix)
* Store {byte,half,word} Caching Inhibited indeXed (st*cix)
for in* and out*, respectively.

Signed-off-by: Krystian Hebel <krystian.hebel@3mdeb.com>

arch/ppc64/include/arch/io.h: implement istep reporting

Change-Id: Ib65c99888ba2e616893a55dff47d2b445052fa7c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57075
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Michał Żygowski 2020-09-15 13:49:42 +02:00 committed by Felix Held
parent 84f3807f5c
commit 708c937c11
1 changed files with 35 additions and 3 deletions
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38
src/arch/ppc64/include/arch/io.h
View File

@ -5,31 +5,63 @@
#include <stdint.h>
/* Set MSB to 1 to ignore HRMOR */
#define MMIO_GROUP0_CHIP0_LPC_BASE_ADDR 0x8006030000000000
#define LPCHC_IO_SPACE 0xD0010000
#define LPC_BASE_ADDR (MMIO_GROUP0_CHIP0_LPC_BASE_ADDR + LPCHC_IO_SPACE)
/* Enforce In-order Execution of I/O */
static inline void eieio(void)
{
asm volatile("eieio" ::: "memory");
}
static inline void outb(uint8_t value, uint16_t port)
{
asm volatile("stbcix %0, %1, %2" :: "r"(value), "b"(LPC_BASE_ADDR), "r"(port));
eieio();
}
static inline void outw(uint16_t value, uint16_t port)
{
asm volatile("sthcix %0, %1, %2" :: "r"(value), "b"(LPC_BASE_ADDR), "r"(port));
eieio();
}
static inline void outl(uint32_t value, uint16_t port)
{
asm volatile("stwcix %0, %1, %2" :: "r"(value), "b"(LPC_BASE_ADDR), "r"(port));
eieio();
}
static inline uint8_t inb(uint16_t port)
{
return 0;
uint8_t buffer;
asm volatile("lbzcix %0, %1, %2" : "=r"(buffer) : "b"(LPC_BASE_ADDR), "r"(port));
eieio();
return buffer;
}
static inline uint16_t inw(uint16_t port)
{
return 0;
uint16_t buffer;
asm volatile("lhzcix %0, %1, %2" : "=r"(buffer) : "b"(LPC_BASE_ADDR), "r"(port));
eieio();
return buffer;
}
static inline uint32_t inl(uint16_t port)
{
return 0;
uint32_t buffer;
asm volatile("lwzcix %0, %1, %2" : "=r"(buffer) : "b"(LPC_BASE_ADDR), "r"(port));
eieio();
return buffer;
}
static inline void report_istep(uint8_t step, uint8_t substep)
{
outb(step, 0x81);
outb(substep, 0x82);
}
#endif