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author | Chris Johns <chrisj@rtems.org> | 2017-12-23 18:18:56 +1100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-01-25 08:45:26 +0100 |
commit | 2afb22b7e1ebcbe40373ff7e0efae7d207c655a9 (patch) | |
tree | 44759efe9374f13200a97e96d91bd9a2b7e5ce2a /bsps/powerpc/include/mpc8260/mmu.h | |
parent | MAINTAINERS: Add myself to Write After Approval. (diff) | |
download | rtems-2afb22b7e1ebcbe40373ff7e0efae7d207c655a9.tar.bz2 |
Remove make preinstall
A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.
This has at least seven problems:
* The make preinstall step itself needs time and disk space.
* Errors in header files show up in the build tree copy. This makes it
hard for editors to open the right file to fix the error.
* There is no clear relationship between source and build tree header
files. This makes an audit of the build process difficult.
* The visibility of all header files in the build tree makes it
difficult to enforce API barriers. For example it is discouraged to
use BSP-specifics in the cpukit.
* An introduction of a new build system is difficult.
* Include paths specified by the -B option are system headers. This
may suppress warnings.
* The parallel build had sporadic failures on some hosts.
This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.
The new cpukit include directories are:
* cpukit/include
* cpukit/score/cpu/@RTEMS_CPU@/include
* cpukit/libnetworking
The new BSP include directories are:
* bsps/include
* bsps/@RTEMS_CPU@/include
* bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include
There are build tree include directories for generated files.
The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.
The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.
Update #3254.
Diffstat (limited to 'bsps/powerpc/include/mpc8260/mmu.h')
-rw-r--r-- | bsps/powerpc/include/mpc8260/mmu.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/bsps/powerpc/include/mpc8260/mmu.h b/bsps/powerpc/include/mpc8260/mmu.h new file mode 100644 index 0000000000..9445dde3bc --- /dev/null +++ b/bsps/powerpc/include/mpc8260/mmu.h @@ -0,0 +1,47 @@ +/* + * mmu.h + * + * This include file contains definitions pertaining + * to the MMU on the MPC8xx. + * + * Copyright (c) 1999, National Research Council of Canada + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef _MPC8260_MMU_H +#define _MPC8260_MMU_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * The MMU_TLB_table is used to statically initialize the Table Lookaside + * Buffers in the MMU of an MPC8260. + */ +typedef struct { + uint32_t mmu_epn; /* Effective Page Number */ + uint32_t mmu_twc; /* Tablewalk Control Register */ + uint32_t mmu_rpn; /* Real Page Number */ +} MMU_TLB_table_t; + +/* + * The MMU_TLB_table and its size, MMU_N_TLB_Table_Entries, must be + * supplied by the BSP. + */ +extern MMU_TLB_table_t MMU_TLB_table[]; /* MMU TLB table supplied by BSP */ +extern int MMU_N_TLB_Table_Entries; /* Number of entries in MMU TLB table */ + +/* Functions */ + +void mmu_init( void ); + +#ifdef __cplusplus +} +#endif + +#endif +/* end of include file */ |