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base-hw: flush cached zeroes in 'clear_ds(...)'

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Ref #706
This commit is contained in:
Martin Stein
2013-04-29 18:58:11 +02:00
committed by Norman Feske
parent a0d182e25a
commit 2e7802b799
10 changed files with 82 additions and 5 deletions
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17
base-hw/include/kernel/syscalls.h
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@ -60,6 +60,7 @@ namespace Kernel
/* management of resource protection-domains */
SET_PAGER = 11,
UPDATE_PD = 12,
UPDATE_REGION = 32,
NEW_PD = 13,
/* interrupt handling */
@ -169,13 +170,27 @@ namespace Kernel
* applied from the moment it returns to the userland. This syscall is
* inappropriate in case that a PD wants to change its own configuration.
* There's no need for this syscall after a configuration change that
* can't affect the kernel and/or hardware caches.
* can't affect the kernel- and/or hardware-caches.
*
* Restricted to core threads.
*/
inline void update_pd(unsigned const pd_id) {
syscall(UPDATE_PD, (Syscall_arg)pd_id); }
/**
* Propagate memory-updates within a given virtual region
*
* \param base virtual base of the region
* \param size size of the region
*
* If one updates a memory region and must ensure that the update
* gets visible directly to other address spaces, this syscall does
* the job.
*
* Restricted to core threads.
*/
inline void update_region(addr_t base, size_t size) {
syscall(UPDATE_REGION, (Syscall_arg)base, (Syscall_arg)size); }
/**
* Create a new thread that is stopped initially