Commit graph

11 commits

Author SHA1 Message Date
Robert Morris 329935eca8 fix uart.c to work with UART_TX_BUF_SIZE == 1 2020-11-05 06:56:51 -05:00
Matt Harvey 6781ac0036
Corrects order of UART RX/TX interrupt enable bits
(per http://byterunner.com/16550.html and manually tested in qemu bare metal echo)
2020-09-14 14:49:57 -07:00
Robert Morris 490f91ab53 move panicked check to uart.c 2020-08-28 09:00:41 -04:00
Robert Morris 2ae9c8e272 defines for UART register bits 2020-08-10 11:19:10 -04:00
Robert Morris 0f50e9527c fix printf() in interrupts 2020-08-10 11:19:10 -04:00
Robert Morris 27057bc9b4 interrupt-driven uart output, hopefully a nice example for teaching. 2020-08-10 11:19:10 -04:00
Robert Morris 1ec50c5848 xxx 2019-07-28 07:43:22 -04:00
Robert Morris 629faafa36 cleaner UART register interface 2019-07-27 06:44:24 -04:00
Robert Morris a33f60fea3 console/uart tweaks 2019-07-27 05:47:19 -04:00
Frans Kaashoek 67702cf706 Checkpoint switching to per-process locks, in attempt clarify xv6's
locking plan, which is a difficult to understand because ptable lock
protects many invariants.  This implementation has a bug: once in a
while xv6 unlocks a proc lock that is locked by another core.
2019-07-02 09:14:47 -04:00
Robert Morris 5753553213 separate source into kernel/ user/ mkfs/ 2019-06-11 09:57:14 -04:00
Renamed from uart.c (Browse further)