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bopti: deprecate image_t, renamed to bopti_image_t
2020-06-01 12:11:59 +02:00
Extensions on existing code:
kernel: dynamic loading of GMAPPED functions to user RAM This commit introduces a large architectural change. Unlike previous models of the fx-9860G series, the G-III models have a new user RAM address different from 8801c000. The purpose of this change is to dynamically load GMAPPED functions to this address by querying the TLB, and call them through a function pointer whose address is determined when loading. Because of the overhead of using a function pointer in both assembly and C code, changes have been made to avoid GMAPPED functions altogether. Current, only cpu_setVBR() and gint_inth_callback() are left, the second being used specifically to enable TLB misses when needed. * Add a .gint.mappedrel section for the function pointers holding addresses to GMAPPED functions; add function pointers for cpu_setVBR() and gint_inth_callback() * Move rram to address 0 instead of the hardcoded 0x8801c000 * Load GMAPPED functions at their linked address + the physical address user RAM is mapped, to and compute their function pointers * Remove the GMAPPED macro since no user function needs it anymore * Add section flags "ax" (code) or "aw" (data) to every custom .section in assembler code, as they default to unpredictable values that can cause the section to be marked NOLOAD by the linker * Update the main kernel, TMU, ETMU and RTC interrupt handlers to use the new indirect calling method This is made possible by new MMU functions giving direct access to the physical area behind any virtualized page. * Add an mmu_translate() function to query the TLB * Add an mmu_uram() function to access user RAM from P1 The exception catching mechanism has been modified to avoid the use of GMAPPED functions altogether. * Set SR.BL=0 and SR.IMASK=15 before calling exception catchers * Move gint_exc_skip() to normal text ROM * Also fix registers not being popped off the stack before a panic The timer drivers have also been modified to avoid GMAPPED functions. * Invoke timer_stop() through gint_inth_callback() and move it to ROM * Move and expand the ETMU driver to span 3 blocks at 0xd00 (ETMU4) * Remove the timer_clear() function by inlining it into the ETMU handler (TCR is provided within the storage block of each timer) * Also split src/timer/inth.s into src/timer/inth-{tmu,etmu}.s Additionally, VBR addresses are now determined at runtime to further reduce hardcoded memory layout addresses in the linker script. * Determine fx-9860G VBR addresses dynamically from mmu_uram() * Determine fx-CG 50 VBR addresses dynamically from mmu_uram() * Remove linker symbols for VBR addresses Comments and documentation have been updated throughout the code to reflect the changes.
2020-09-17 14:48:54 +02:00
* kernel: group linker script symbols in a single header file
* kernel: be consistent about *tlb_mapped_memory() in hw_detect()
core: finalize TLB management in timer callbacks (STABLE) This change enables interrupts within timer callbacks, making it possible to load pages to MMU while handling a timer underflow. The call to TLB_LoadPTEH() has been moved directly into the VBR handler to avoid jumping to ILRAM for a short call on SH4. The TMU and ETMU handlers have been changed to callback through a new function gint_inth_callback() that saves the user bank and a few registers, then invokes the callback with interrupts enabled and in user bank; until now, callbacks were invoked with interrupts disabled and in kernel bank. Note that IMASK is still set so a callback can only be interrupted by a high-priority interrupt. A timer_wait() function has also been added to simplify tests that involve timers. Finally, the priority level of the TMU0 underflow interrupt has been set to 13 (as per the comments) instead of 7. This version is the first stable version that handles TLB misses transparently for large add-ins. It is suitable for every gint application.
2020-06-17 11:36:05 +02:00
* bopti: try to display fullscreen images with TLB access + DMA on fxcg50
drivers: update the model, replacing unload() with wait() The unload() function is not very relevant for drivers because hardware state is managed by ctx_save() and ctx_restore() and software state is managed by underlying drivers when there are dependencies. For now, it's been replaced with a wait() function that allows drivers to not be interrupted at any point. It is currently used by the DMA to wait for ongoing transfers to finish before disabling interrupts (which would prevent the transfer end from being detected) and switching in and out of gint.
2020-05-10 16:36:21 +02:00
* dma: fx9860g support (need to switch it on and update the Makefile)
small improvements * Update TOTO list * Change the type of gint_vbr to comply with a new warning in GCC 9 * Add strcmp()
2019-09-19 15:59:38 +02:00
* core: try to leave add-in without reset in case of panic
core: better bootlog API and implementation * Now uses topti instead of fxlib for text (including MMU failure) * Fit .pretext into 4k for everything before MMU succeeds * A short version of sprintf() for dynamic messages * Support a driver function, status(), to allow early driver debug * Expose more useful platform information in <gint/mpu.h> * Expose the first of a few CASIOWIN syscalls
2019-03-06 14:32:51 +01:00
* core: use cmp/str for memchr()
TODO update and miscellaneous style
2019-07-17 00:34:10 +02:00
* r61524: brightness control and clean the file
bopti: deprecate image_t, renamed to bopti_image_t
2020-06-01 12:11:59 +02:00
* core: review forgotten globals and MPU addresses not in <gint/mpu/*.h>
code review and display driver changes t6k11: use the gint array for variant detection r61524: use true triple buffering by default display: define DWIDTH and DHEIGHT display: add C_RGB(r,g,b) (0 ≤ r,g,b ≤ 31) [fxcg50]
2020-02-23 15:49:55 +01:00
* build: make the build system simpler (two targets are enough by default)
gray: add engine, basic drawing and text This revision includes the base gray engine with sensible starting defaults, gclear() and grect(), as well as gtext().
2019-07-20 18:31:46 +02:00
* core: run destructors when a task-switch results in leaving the app
code review and display driver changes t6k11: use the gint array for variant detection r61524: use true triple buffering by default display: define DWIDTH and DHEIGHT display: add C_RGB(r,g,b) (0 ≤ r,g,b ≤ 31) [fxcg50]
2020-02-23 15:49:55 +01:00
* core rtc: use qdiv10 to massively improve division performance
cpg: add spread spectrum control Disables spread spectrum by default so that the frequency estimations of the CPG driver (notably used by the timer driver and libprof) are more accurate.
2020-07-20 17:10:47 +02:00
* topti: let the font specify letter and word spacing
core: better bootlog API and implementation * Now uses topti instead of fxlib for text (including MMU failure) * Fit .pretext into 4k for everything before MMU succeeds * A short version of sprintf() for dynamic messages * Support a driver function, status(), to allow early driver debug * Expose more useful platform information in <gint/mpu.h> * Expose the first of a few CASIOWIN syscalls
2019-03-06 14:32:51 +01:00
Future directions.
TODO update and miscellaneous style
2019-07-17 00:34:10 +02:00
* A complete file system abstraction
core: better bootlog API and implementation * Now uses topti instead of fxlib for text (including MMU failure) * Fit .pretext into 4k for everything before MMU succeeds * A short version of sprintf() for dynamic messages * Support a driver function, status(), to allow early driver debug * Expose more useful platform information in <gint/mpu.h> * Expose the first of a few CASIOWIN syscalls
2019-03-06 14:32:51 +01:00
* Integrate overclock management
bopti: deprecate image_t, renamed to bopti_image_t
2020-06-01 12:11:59 +02:00
* Audio playback using TSWilliamson's libsnd method
* Serial communication
* USB communication, using Yatis' reverse-engineering of the module
drivers: update the model, replacing unload() with wait() The unload() function is not very relevant for drivers because hardware state is managed by ctx_save() and ctx_restore() and software state is managed by underlying drivers when there are dependencies. For now, it's been replaced with a wait() function that allows drivers to not be interrupted at any point. It is currently used by the DMA to wait for ongoing transfers to finish before disabling interrupts (which would prevent the transfer end from being detected) and switching in and out of gint.
2020-05-10 16:36:21 +02:00
* Make fx9860g projects work out of the box on fxcg50
core: accept large add-ins and setup TLB management (UNSTABLE) This change modifies the fx-CG 50 linker script to allow add-ins up to 2M and no longer complains about add-ins that don't fit in the TLB. It also exposes the __TLB_LoadPTEH() syscall (%003 on fx9860g, %00c on fxcg50) that answers TLB misses. This syscall can be called manually from an add-in to load some pages and seems to work without problem. However, this version does not provide any automatic TLB management, some key areas of the kernel are still under TLB and some user code (such as timer callbacks) is not! This version is suitable only for add-ins smaller than 220k!
2020-06-14 11:01:27 +02:00
* Use the DSP to enhance parallel computation
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