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base-hw: timer support for RISC-V

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issue #2423
This commit is contained in:
Sebastian Sumpf 2017-08-25 14:18:31 +02:00 committed by Christian Helmuth
parent bcfcc1db9c
commit f361cb28a5
5 changed files with 13 additions and 14 deletions
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2
repos/base-hw/ports/bbl.hash
View File

@ -1 +1 @@
98f2f30366201ee9826a78ff165cef69b6fd8e57
10f40152b12a9fd068f88a587e84e342b707698e

2
repos/base-hw/ports/bbl.port
View File

@ -3,6 +3,6 @@ VERSION := git
DOWNLOADS := bbl.git
URL(bbl) = https://github.com/ssumpf/bbl-lite.git
REV(bbl) = 89f92ff01f675f907755b055c58c2142739d5bd8
REV(bbl) = 0f86d104c470cfad70a9bc049865edb2ab0c4710
DIR(bbl) = src/lib/bbl

3
repos/base-hw/src/core/spec/riscv/timer.cc
View File

@ -26,6 +26,7 @@ Timer_driver::Timer_driver(unsigned)
asm volatile ("csrs sie, %0" : : "r"(STIE));
}
addr_t Timer_driver::stime() { return Hw::get_sys_timer(); }
void Timer::_start_one_shot(time_t const ticks)
{
@ -54,4 +55,4 @@ time_t Timer::_value()
unsigned Timer::interrupt_id() const {
return 1; }
return 5; }

8
repos/base-hw/src/core/spec/riscv/timer_driver.h
View File

@ -26,17 +26,13 @@ namespace Kernel { class Timer_driver; }
struct Kernel::Timer_driver
{
enum {
SPIKE_TIMER_HZ = 500000,
SPIKE_TIMER_HZ = 1000000,
TICS_PER_MS = SPIKE_TIMER_HZ / 1000,
};
addr_t timeout = 0;
/* TODO: implement */
addr_t stime()
{
return 0;
}
addr_t stime();
Timer_driver(unsigned);
};

12
repos/base-hw/src/lib/hw/spec/riscv/machine_call.h
View File

@ -28,16 +28,18 @@ namespace Hw {
*
* Keep in sync with mode_transition.s.
*/
constexpr Call_arg call_id_set_sys_timer() { return 0x101; }
constexpr Call_arg call_id_get_sys_timer() { return 0x102; }
constexpr Call_arg call_id_set_sys_timer() { return 200; }
constexpr Call_arg call_id_get_sys_timer() { return 201; }
inline void ecall(addr_t call, addr_t arg)
inline addr_t ecall(addr_t call, addr_t arg)
{
asm volatile ("mv a0, %0\n"
"mv a1, %1\n"
"ecall \n"
: : "r"(call), "r"(arg)
"ecall \n"
"mv %0, a0\n"
: "+r"(call) : "r"(arg)
: "a0", "a1");
return call;
}
inline void put_char(addr_t c) {