score: Simplify priority bit map implementation

The priority bit map can deal with a maximum of 256 priority values
ranging from 0 to 255.  Consistently use an unsigned int for
computation, due to the usual integer promotion rules.

Make Priority_bit_map_Word definition architecture-independent and
define it to uint16_t.  This was already the case for all architectures
except PowerPC.  Adjust the PowerPC bitmap support accordingly.

cpukit/score/cpu/arm/rtems/score/types.h

@@ -40,8 +40,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t         Priority_bit_map_Word;
-
 /** @} */
 
 #ifdef __cplusplus

cpukit/score/cpu/bfin/rtems/score/types.h

@@ -34,9 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-/** This defines the type for a priority bit map entry. */
-typedef uint16_t Priority_bit_map_Word;
-
 /** This defines the return type for an ISR entry point. */
 typedef void blackfin_isr;
 

cpukit/score/cpu/epiphany/rtems/score/cpu.h

@@ -699,7 +699,6 @@ typedef struct {
 #define CPU_MAXIMUM_PROCESSORS 32
 
 #ifndef ASM
-typedef uint16_t Priority_bit_map_Word;
 
 typedef struct {
   uint32_t r[62];

cpukit/score/cpu/epiphany/rtems/score/types.h

@@ -53,7 +53,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t Priority_bit_map_Word;
 typedef void epiphany_isr;
 typedef void ( *epiphany_isr_entry )( void );
 

cpukit/score/cpu/i386/rtems/score/types.h

@@ -34,7 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t Priority_bit_map_Word;
 typedef void i386_isr;
 typedef i386_isr ( *i386_isr_entry )( void );
 

cpukit/score/cpu/lm32/rtems/score/types.h

@@ -37,9 +37,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-/** This defines the type for a priority bit map entry. */
-typedef uint16_t Priority_bit_map_Word;
-
 #ifdef __cplusplus
 }
 #endif

cpukit/score/cpu/m32c/rtems/score/types.h

@@ -34,9 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef unsigned long CPU_Uint32ptr;
 
-/** This defines the type for a priority bit map entry. */
-typedef uint16_t Priority_bit_map_Word;
-
 /** This defines the return type for an ISR entry point. */
 typedef void m32c_isr;
 

cpukit/score/cpu/m68k/rtems/score/types.h

@@ -34,8 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t     Priority_bit_map_Word;
-
 #ifdef __cplusplus
 }
 #endif

cpukit/score/cpu/mips/rtems/score/types.h

@@ -43,7 +43,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t     Priority_bit_map_Word;
 typedef void mips_isr;
 typedef void ( *mips_isr_entry )( void );
 

cpukit/score/cpu/moxie/rtems/score/types.h

@@ -38,7 +38,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t     Priority_bit_map_Word;
 typedef void moxie_isr;
 typedef void ( *moxie_isr_entry )( void );
 

cpukit/score/cpu/nios2/rtems/score/types.h

@@ -34,7 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t Priority_bit_map_Word;
 typedef void nios2_isr;
 typedef void ( *nios2_isr_entry )( void );
 

cpukit/score/cpu/no_cpu/rtems/score/types.h

@@ -34,9 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-/** This defines the type for a priority bit map entry. */
-typedef uint16_t Priority_bit_map_Word;
-
 #ifdef __cplusplus
 }
 #endif

cpukit/score/cpu/or1k/rtems/score/cpu.h

@@ -687,7 +687,6 @@ typedef struct {
 
 #ifndef ASM
 typedef uint32_t CPU_Counter_ticks;
-typedef uint16_t Priority_bit_map_Word;
 
 typedef struct {
   uint32_t r[32];

cpukit/score/cpu/or1k/rtems/score/types.h

@@ -39,7 +39,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t Priority_bit_map_Word;
 typedef void or1k_isr;
 typedef void ( *or1k_isr_entry )( void );
 

cpukit/score/cpu/powerpc/rtems/score/cpu.h

@@ -981,6 +981,7 @@ void _CPU_Context_Initialize(
   { \
     __asm__ volatile ("cntlzw %0, %1" : "=r" ((_output)), "=r" ((_value)) : \
 		  "1" ((_value))); \
+    (_output) = (_output) - 16; \
   }
 
 /* end of Bitfield handler macros */
@@ -992,7 +993,7 @@ void _CPU_Context_Initialize(
  */
 
 #define _CPU_Priority_Mask( _bit_number ) \
-  ( 0x80000000 >> (_bit_number) )
+  ( 0x8000u >> (_bit_number) )
 
 /*
  *  This routine translates the bit numbers returned by

cpukit/score/cpu/powerpc/rtems/score/types.h

@@ -51,7 +51,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint32_t     Priority_bit_map_Word;
 typedef void ppc_isr;
 
 #ifdef __cplusplus

cpukit/score/cpu/sh/rtems/score/types.h

@@ -44,8 +44,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t     Priority_bit_map_Word;
-
 typedef void sh_isr;
 typedef void ( *sh_isr_entry )( void );
 

cpukit/score/cpu/sparc/rtems/score/types.h

@@ -30,15 +30,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-/**
- * @brief Priority bit map type.
- *
- * On the SPARC, there is no bitscan instruction and no penalty associated
- * for using 16-bit variables.  With no overriding architectural factors,
- * just using a uint16_t.
- */
-typedef uint16_t Priority_bit_map_Word;
-
 /**
  * @brief SPARC ISR handler return type.
  *

cpukit/score/cpu/sparc64/rtems/score/types.h

@@ -33,7 +33,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-typedef uint16_t         Priority_bit_map_Word;
 typedef void sparc_isr;
 typedef void ( *sparc_isr_entry )( void );
 

cpukit/score/cpu/v850/rtems/score/types.h

@@ -34,9 +34,6 @@ extern "C" {
 /** Type that can store a 32-bit integer or a pointer. */
 typedef uintptr_t CPU_Uint32ptr;
 
-/** This defines the type for a priority bit map entry. */
-typedef uint16_t Priority_bit_map_Word;
-
 #ifdef __cplusplus
 }
 #endif

cpukit/score/include/rtems/score/prioritybitmap.h

@@ -32,10 +32,7 @@ extern "C" {
  */
 /**@{*/
 
-/*
+typedef uint16_t Priority_bit_map_Word;
- *  The definition of the Priority_bit_map_Word type is CPU dependent.
- *
- */
 
 typedef struct {
   /**

cpukit/score/include/rtems/score/prioritybitmapimpl.h

@@ -20,7 +20,6 @@
 #define _RTEMS_SCORE_PRIORITYBITMAPIMPL_H
 
 #include <rtems/score/prioritybitmap.h>
-#include <rtems/score/priority.h>
 
 #include <string.h>
 
@@ -65,8 +64,8 @@ extern const unsigned char _Bitfield_Leading_zeros[256];
 #else
 #define _Bitfield_Find_first_bit( _value, _bit_number ) \
   { \
-    register uint32_t   __value = (uint32_t) (_value); \
+    unsigned int __value = (_value); \
-    register const unsigned char *__p = _Bitfield_Leading_zeros; \
+    const unsigned char *__p = _Bitfield_Leading_zeros; \
     \
     if ( __value < 0x100 ) \
       (_bit_number) = (Priority_bit_map_Word)( __p[ __value ] + 8 );  \
@@ -108,22 +107,18 @@ extern const unsigned char _Bitfield_Leading_zeros[256];
  * This function returns the major portion of the_priority.
  */
 
-RTEMS_INLINE_ROUTINE Priority_bit_map_Word   _Priority_Major (
+RTEMS_INLINE_ROUTINE unsigned int _Priority_Major( unsigned int the_priority )
-  Priority_Control the_priority
-)
 {
-  return (Priority_bit_map_Word)( the_priority / 16 );
+  return the_priority / 16;
 }
 
 /**
  * This function returns the minor portion of the_priority.
  */
 
-RTEMS_INLINE_ROUTINE Priority_bit_map_Word   _Priority_Minor (
+RTEMS_INLINE_ROUTINE unsigned int _Priority_Minor( unsigned int the_priority )
-  Priority_Control the_priority
-)
 {
-  return (Priority_bit_map_Word)( the_priority % 16 );
+  return the_priority % 16;
 }
 
 #if ( CPU_USE_GENERIC_BITFIELD_CODE == TRUE )
@@ -134,31 +129,20 @@ RTEMS_INLINE_ROUTINE Priority_bit_map_Word   _Priority_Minor (
  */
 
 RTEMS_INLINE_ROUTINE Priority_bit_map_Word   _Priority_Mask (
-  uint32_t   bit_number
+  unsigned int bit_number
 )
 {
   return (Priority_bit_map_Word)(0x8000u >> bit_number);
 }
 
-/**
- * This function returns the mask bit inverted.
- */
-
-RTEMS_INLINE_ROUTINE Priority_bit_map_Word   _Priority_Mask_invert (
-  uint32_t   mask
-)
-{
-  return (Priority_bit_map_Word)(~mask);
-}
-
 /**
  * This function translates the bit numbers returned by the bit scan
  * of a priority bit field into something suitable for use as
  * a major or minor component of a priority.
  */
 
-RTEMS_INLINE_ROUTINE uint32_t   _Priority_Bits_index (
+RTEMS_INLINE_ROUTINE unsigned int _Priority_Bits_index(
-  uint32_t   bit_number
+  unsigned int bit_number
 )
 {
   return bit_number;
@@ -196,15 +180,15 @@ RTEMS_INLINE_ROUTINE void _Priority_bit_map_Remove (
     bit_map->major_bit_map &= bit_map_info->block_major;
 }
 
-RTEMS_INLINE_ROUTINE Priority_Control _Priority_bit_map_Get_highest(
+RTEMS_INLINE_ROUTINE unsigned int _Priority_bit_map_Get_highest(
   const Priority_bit_map_Control *bit_map
 )
 {
-  Priority_bit_map_Word minor;
+  unsigned int minor;
-  Priority_bit_map_Word major;
+  unsigned int major;
 
   /* Avoid problems with some inline ASM statements */
-  Priority_bit_map_Word tmp;
+  unsigned int tmp;
 
   tmp = bit_map->major_bit_map;
   _Bitfield_Find_first_bit( tmp, major );
@@ -226,11 +210,11 @@ RTEMS_INLINE_ROUTINE bool _Priority_bit_map_Is_empty(
 RTEMS_INLINE_ROUTINE void _Priority_bit_map_Initialize_information(
   Priority_bit_map_Control     *bit_map,
   Priority_bit_map_Information *bit_map_info,
-  Priority_Control              new_priority
+  unsigned int                  new_priority
 )
 {
-  Priority_bit_map_Word major;
+  unsigned int major;
-  Priority_bit_map_Word minor;
+  unsigned int minor;
   Priority_bit_map_Word mask;
 
   major = _Priority_Major( new_priority );
@@ -240,13 +224,11 @@ RTEMS_INLINE_ROUTINE void _Priority_bit_map_Initialize_information(
 
   mask = _Priority_Mask( major );
   bit_map_info->ready_major = mask;
-  /* Add _Priority_Mask_invert to non-generic bitfield then change this code. */
+  bit_map_info->block_major = (Priority_bit_map_Word) ~mask;
-  bit_map_info->block_major = (Priority_bit_map_Word)(~((uint32_t)mask));
 
   mask = _Priority_Mask( minor );
   bit_map_info->ready_minor = mask;
-  /* Add _Priority_Mask_invert to non-generic bitfield then change this code. */
+  bit_map_info->block_minor = (Priority_bit_map_Word) ~mask;
-  bit_map_info->block_minor = (Priority_bit_map_Word)(~((uint32_t)mask));
 }
 
 /** @} */