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author | Kevin O'Connor <kevin@koconnor.net> | 2013-07-20 12:08:48 -0400 |
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committer | Kevin O'Connor <kevin@koconnor.net> | 2013-07-20 19:29:54 -0400 |
commit | 69013378972c07c9a1e46fa6ec274070cad1a532 (patch) | |
tree | 4e9c270ca2aa83fa098ecd54b49528d4a102c9fa /src | |
parent | 118605f1dd2a30813c89b35420edb472875d4bd2 (diff) | |
download | seabios-hppa-69013378972c07c9a1e46fa6ec274070cad1a532.zip seabios-hppa-69013378972c07c9a1e46fa6ec274070cad1a532.tar.gz seabios-hppa-69013378972c07c9a1e46fa6ec274070cad1a532.tar.bz2 |
Add helper functions to convert timer irqs to milliseconds.
Add ticks_to_ms() and ticks_from_ms() helpers.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src')
-rw-r--r-- | src/clock.c | 3 | ||||
-rw-r--r-- | src/timer.c | 19 | ||||
-rw-r--r-- | src/usb-ehci.c | 3 | ||||
-rw-r--r-- | src/usb-ohci.c | 3 | ||||
-rw-r--r-- | src/usb-uhci.c | 3 | ||||
-rw-r--r-- | src/util.h | 2 |
6 files changed, 22 insertions, 11 deletions
diff --git a/src/clock.c b/src/clock.c index b9a708b..2f2ca07 100644 --- a/src/clock.c +++ b/src/clock.c @@ -94,8 +94,7 @@ clock_setup(void) u32 seconds = bcd2bin(inb_cmos(CMOS_RTC_SECONDS)); u32 minutes = bcd2bin(inb_cmos(CMOS_RTC_MINUTES)); u32 hours = bcd2bin(inb_cmos(CMOS_RTC_HOURS)); - u32 ticks = (hours * 60 + minutes) * 60 + seconds; - ticks = ((u64)ticks * PIT_TICK_RATE) / PIT_TICK_INTERVAL; + u32 ticks = ticks_from_ms(((hours * 60 + minutes) * 60 + seconds) * 1000); SET_BDA(timer_counter, ticks); // Setup Century storage diff --git a/src/timer.c b/src/timer.c index 87df97b..0fd0194 100644 --- a/src/timer.c +++ b/src/timer.c @@ -198,6 +198,21 @@ calc_future_tsc_usec(u32 usecs) * IRQ based timer ****************************************************************/ +// Return the number of milliseconds in 'ticks' number of timer irqs. +u32 +ticks_to_ms(u32 ticks) +{ + return DIV_ROUND_UP(PIT_TICK_INTERVAL * 1000 * ticks, PIT_TICK_RATE); +} + +// Return the number of timer irqs in 'ms' number of milliseconds. +u32 +ticks_from_ms(u32 ms) +{ + u32 kticks = DIV_ROUND_UP((u64)ms * PIT_TICK_RATE, PIT_TICK_INTERVAL); + return DIV_ROUND_UP(kticks, 1000); +} + // Calculate the timer value at 'count' number of full timer ticks in // the future. u32 @@ -212,9 +227,7 @@ calc_future_timer(u32 msecs) { if (!msecs) return GET_BDA(timer_counter); - u32 kticks = DIV_ROUND_UP((u64)msecs * PIT_TICK_RATE, PIT_TICK_INTERVAL); - u32 ticks = DIV_ROUND_UP(kticks, 1000); - return calc_future_timer_ticks(ticks); + return calc_future_timer_ticks(ticks_from_ms(msecs)); } // Check if the given timer value has passed. diff --git a/src/usb-ehci.c b/src/usb-ehci.c index e1e659b..c1638e4 100644 --- a/src/usb-ehci.c +++ b/src/usb-ehci.c @@ -15,7 +15,6 @@ #include "biosvar.h" // GET_LOWFLAT #include "usb-uhci.h" // uhci_setup #include "usb-ohci.h" // ohci_setup -#include "pit.h" // PIT_TICK_RATE struct usb_ehci_s { struct usb_s usb; @@ -427,7 +426,7 @@ ehci_alloc_intr_pipe(struct usbdevice_s *usbdev int maxpacket = epdesc->wMaxPacketSize; // Determine number of entries needed for 2 timer ticks. int ms = 1<<frameexp; - int count = DIV_ROUND_UP(PIT_TICK_INTERVAL * 1000 * 2, PIT_TICK_RATE * ms); + int count = DIV_ROUND_UP(ticks_to_ms(2), ms); struct ehci_pipe *pipe = memalign_low(EHCI_QH_ALIGN, sizeof(*pipe)); struct ehci_qtd *tds = memalign_low(EHCI_QTD_ALIGN, sizeof(*tds) * count); void *data = malloc_low(maxpacket * count); diff --git a/src/usb-ohci.c b/src/usb-ohci.c index f3a3b3b..b2e1d7f 100644 --- a/src/usb-ohci.c +++ b/src/usb-ohci.c @@ -11,7 +11,6 @@ #include "pci_regs.h" // PCI_BASE_ADDRESS_0 #include "usb.h" // struct usb_s #include "biosvar.h" // GET_LOWFLAT -#include "pit.h" // PIT_TICK_RATE #define FIT (1 << 31) @@ -328,7 +327,7 @@ ohci_alloc_intr_pipe(struct usbdevice_s *usbdev int maxpacket = epdesc->wMaxPacketSize; // Determine number of entries needed for 2 timer ticks. int ms = 1<<frameexp; - int count = DIV_ROUND_UP(PIT_TICK_INTERVAL * 1000 * 2, PIT_TICK_RATE * ms)+1; + int count = DIV_ROUND_UP(ticks_to_ms(2), ms) + 1; struct ohci_pipe *pipe = malloc_low(sizeof(*pipe)); struct ohci_td *tds = malloc_low(sizeof(*tds) * count); void *data = malloc_low(maxpacket * count); diff --git a/src/usb-uhci.c b/src/usb-uhci.c index e77f5c1..5fa05a8 100644 --- a/src/usb-uhci.c +++ b/src/usb-uhci.c @@ -12,7 +12,6 @@ #include "pci_regs.h" // PCI_BASE_ADDRESS_4 #include "usb.h" // struct usb_s #include "biosvar.h" // GET_LOWFLAT -#include "pit.h" // PIT_TICK_RATE struct usb_uhci_s { struct usb_s usb; @@ -283,7 +282,7 @@ uhci_alloc_intr_pipe(struct usbdevice_s *usbdev int maxpacket = epdesc->wMaxPacketSize; // Determine number of entries needed for 2 timer ticks. int ms = 1<<frameexp; - int count = DIV_ROUND_UP(PIT_TICK_INTERVAL * 1000 * 2, PIT_TICK_RATE * ms); + int count = DIV_ROUND_UP(ticks_to_ms(2), ms); count = ALIGN(count, 2); struct uhci_pipe *pipe = malloc_low(sizeof(*pipe)); struct uhci_td *tds = malloc_low(sizeof(*tds) * count); @@ -282,6 +282,8 @@ void useRTC(void); void releaseRTC(void); // timer.c +u32 ticks_to_ms(u32 ticks); +u32 ticks_from_ms(u32 ms); void pmtimer_setup(u16 ioport); int check_tsc(u64 end); void timer_setup(void); |