diff options
Diffstat (limited to 'libbsd.txt')
-rw-r--r-- | libbsd.txt | 14 |
1 files changed, 13 insertions, 1 deletions
@@ -67,7 +67,7 @@ The SVN checkout command is this * How does one initialize the TCP/IP stack? * linker section issues: I have undefined symbols for - _bsd__start_set_sysinit_set and _bsd__stop_set_sysinit_set. + `_bsd__start_set_sysinit_set` and `_bsd__stop_set_sysinit_set`. Is this the only type of new section magic? What about the old sysctl_set? I added this to my linkcmds. @@ -81,6 +81,18 @@ The SVN checkout command is this ---- +* Why is the interrupt server used? The BSD interrupt handlers can block on +synchronization primitives like mutexes. This is in contrast to RTEMS +interrupt service routines. The BSPs using the generic interrupt support must +implement the `bsp_interrupt_vector_enable()` and +`bsp_interrupt_vector_disable()` routines. They normally enable/disable a +particular interrupt source at the interrupt controller. This can be used to +implement the interrupt server. The interrupt server is a task that wakes-up +in case an associated interrupt happens. The interrupt source is disabled in +a generic interrupt handler that wakes-up the interrupt server task. Once the +postponed interrupt processing is performed in the interrupt server the +interrupt source is enabled again. + * Convert all BSP linkcmds to use a linkcmds.base so the sections are easier to insert. |