commit cfeb07ededa388a6958d39f079247262ab5f8008
author Andy Ross <andrew.j.ross@intel.com> Thu Mar 05 21:14:02 2020 -0800
committer Anas Nashif <anas.nashif@intel.com> Tue Mar 31 19:40:47 2020 -0400
tree fd88c97cd9579a352c49019a6d0ccdbfb054c8d0
parent 7832738ae985a63febb8f82e7c4e34824f48486e

kernel/timeout: Enable 64 bit timeout precision

Add a CONFIG_TIMEOUT_64BIT kconfig that, when selected, makes the
k_ticks_t used in timeout computations pervasively 64 bit.  This will
allow much longer timeouts and much faster (i.e. more precise) tick
rates.  It also enables the use of absolute (not delta) timeouts in an
upcoming commit.

Signed-off-by: Andy Ross <andrew.j.ross@intel.com>

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1ece51e..80b8964 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -604,6 +604,10 @@
   set(SYSCALL_LONG_REGISTERS_ARG --long-registers)
 endif()
 
+if(CONFIG_TIMEOUT_64BIT)
+  set(SYSCALL_SPLIT_TIMEOUT_ARG --split-type k_timeout_t)
+endif()
+
 add_custom_command(OUTPUT include/generated/syscall_dispatch.c ${syscall_list_h}
   # Also, some files are written to include/generated/syscalls/
   COMMAND
@@ -614,6 +618,7 @@
   --syscall-dispatch include/generated/syscall_dispatch.c # Write this file
   --syscall-list     ${syscall_list_h}
   ${SYSCALL_LONG_REGISTERS_ARG}
+  ${SYSCALL_SPLIT_TIMEOUT_ARG}
   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
   DEPENDS ${PARSE_SYSCALLS_TARGET}
   ${syscalls_json}