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author | Patrick Williams <iawillia@us.ibm.com> | 2011-06-08 10:49:39 -0500 |
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committer | A. Patrick Williams III <iawillia@us.ibm.com> | 2011-06-08 14:01:38 -0500 |
commit | 63657a69627ca1dbd10fb683a8096ab2e8e77f2b (patch) | |
tree | f5aa6875dfbdd887c52541c779ff275596ad8f6d /src/include/sys/mmio.h | |
parent | 74b9b31c9ae811dd527d4eb328e9fa93327442ab (diff) | |
download | talos-hostboot-63657a69627ca1dbd10fb683a8096ab2e8e77f2b.tar.gz talos-hostboot-63657a69627ca1dbd10fb683a8096ab2e8e77f2b.zip |
Create per-CPU mutex for XSCOM usage.
Change-Id: I76ad5c1d553d544b52910afd82e2716781ea13b9
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/140
Tested-by: Jenkins Server
Reviewed-by: Thi N. Tran <thi@us.ibm.com>
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Diffstat (limited to 'src/include/sys/mmio.h')
-rw-r--r-- | src/include/sys/mmio.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/include/sys/mmio.h b/src/include/sys/mmio.h index eb146da72..c36a13821 100644 --- a/src/include/sys/mmio.h +++ b/src/include/sys/mmio.h @@ -2,6 +2,7 @@ #define __SYS_MMIO_H #include <stdint.h> +#include <sys/mutex.h> #ifdef __cplusplus extern "C" @@ -25,6 +26,20 @@ uint64_t mmio_hmer_read(); */ int mmio_hmer_write(uint64_t value); +/** @fn mmio_xscom_mutex() + * @brief Returns the per-CPU mutex for the XSCOM hardware logic. + * + * @pre Task must be pinned to a CPU by task_affinity_pin. Function will + * assert if not met. + * + * @returns The existing mutex for the CPU or creates a new one. + * + * @note The task should only interact with the mutex while protected by an + * affinity pin. If the pin is moved the mutex is no longer + * guarenteed for the CPU the task is executing on. + */ +mutex_t mmio_xscom_mutex(); + #ifdef __cplusplus } #endif |