x86: Unify arch/io.h and arch/romcc_io.h

Here's the great news: From now on you don't have to worry about
hitting the right io.h include anymore. Just forget about romcc_io.h
and use io.h instead. This cleanup has a number of advantages, like
you don't have to guard device/ includes for SMM and pre RAM
anymore. This allows to get rid of a number of ifdefs and will
generally make the code more readable and understandable.

Potentially in the future some of the code in the io.h __PRE_RAM__
path should move to device.h or other device/ includes instead,
but that's another incremental change.

Change-Id: I356f06110e2e355e9a5b4b08c132591f36fec7d9
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2872
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/include/cpu/cpu.h

@@ -3,7 +3,7 @@
 
 #include <arch/cpu.h>
 
-#if !defined(__ROMCC__)
+#if !defined(__PRE_RAM__) && !defined(__SMM__)
 void cpu_initialize(unsigned int cpu_index);
 struct bus;
 void initialize_cpus(struct bus *cpu_bus);
@@ -20,6 +20,6 @@ void smm_setup_structures(void *gnvs, void *tcg, void *smi1);
 extern struct cpu_driver cpu_drivers[];
 /** end of compile time generated pci driver array */
 extern struct cpu_driver ecpu_drivers[];
-#endif /* !__ROMCC__ */
+#endif /* !__PRE_RAM__ && !__SMM__ */
 
 #endif /* CPU_CPU_H */

src/include/device/device.h

@@ -1,6 +1,7 @@
 #ifndef DEVICE_H
 #define DEVICE_H
 
+#ifndef __SMM__
 #include <stdint.h>
 #include <stddef.h>
 #include <device/resource.h>
@@ -222,4 +223,7 @@ ROMSTAGE_CONST struct device * dev_find_slot (unsigned int bus,
 ROMSTAGE_CONST struct device * dev_find_slot_on_smbus (unsigned int bus,
 							unsigned int addr);
 #endif
+#else /* __SMM__ */
+#include <arch/io.h>
+#endif /* __SMM__ */
 #endif /* DEVICE_H */

src/include/device/pci.h

@@ -20,7 +20,7 @@
 #include <device/pci_def.h>
 #include <device/resource.h>
 #include <device/device.h>
-#ifndef __PRE_RAM__
+#if !defined(__PRE_RAM__) && !defined(__SMM__)
 #include <device/pci_ops.h>
 #include <device/pci_rom.h>
 

src/include/device/pci_ops.h

@@ -1,6 +1,7 @@
 #ifndef PCI_OPS_H
 #define PCI_OPS_H
 
+#ifndef __SMM__
 #include <stdint.h>
 #include <device/device.h>
 #include <arch/pci_ops.h>
@@ -20,5 +21,6 @@ void pci_mmio_write_config8(device_t dev, unsigned int where, u8 val);
 void pci_mmio_write_config16(device_t dev, unsigned int where, u16 val);
 void pci_mmio_write_config32(device_t dev, unsigned int where, u32 val);
 #endif
+#endif
 
 #endif /* PCI_OPS_H */

src/include/device/pnp.h

@@ -5,6 +5,7 @@
 #include <device/device.h>
 #include <device/pnp_def.h>
 
+#if !defined(__PRE_RAM__) && !defined(__SMM__)
 /* Primitive PNP resource manipulation */
 void pnp_write_config(device_t dev, u8 reg, u8 value);
 u8 pnp_read_config(device_t dev, u8 reg);
@@ -50,4 +51,5 @@ struct resource *pnp_get_resource(device_t dev, unsigned index);
 void pnp_enable_devices(struct device *dev, struct device_operations *ops,
 			unsigned int functions, struct pnp_info *info);
 
+#endif
 #endif /* DEVICE_PNP_H */

src/include/lib.h

@@ -24,7 +24,7 @@
 #include <stdint.h>
 #ifndef __ROMCC__ /* romcc doesn't support prototypes. */
 
-#ifndef __PRE_RAM__ /* Conflicts with romcc_io.h */
+#ifndef __PRE_RAM__ /* Conflicts with inline function in arch/io.h */
 /* Defined in src/lib/clog2.c */
 unsigned long log2(unsigned long x);
 #endif