[xsrc/trunk]: xsrc/external/mit/xf86-video-suncg6/dist/src Check the PROM for...

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/xsrc/rev/51fc3236abfe
branches:  trunk
changeset: 6957:51fc3236abfe
user:      macallan <macallan%NetBSD.org@localhost>
date:      Wed Mar 09 17:57:50 2022 +0000

description:
Check the PROM for the amount of available VRAM instead of guessing, and use
it all, now that we know we can.

thanks foo bar

diffstat:

 external/mit/xf86-video-suncg6/dist/src/cg6_driver.c |  14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diffs (31 lines):

diff -r 024d3953c0e5 -r 51fc3236abfe external/mit/xf86-video-suncg6/dist/src/cg6_driver.c
--- a/external/mit/xf86-video-suncg6/dist/src/cg6_driver.c      Fri Mar 04 05:56:55 2022 +0000
+++ b/external/mit/xf86-video-suncg6/dist/src/cg6_driver.c      Wed Mar 09 17:57:50 2022 +0000
@@ -442,7 +442,8 @@
     ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
     Cg6Ptr pCg6;
     sbusDevicePtr psdp;
-    int ret;
+    int ret, prom, len, vmsize;
+    char *b;
 
     pCg6 = GET_CG6_FROM_SCRN(pScrn);
     psdp = pCg6->psdp;
@@ -457,6 +458,17 @@
      * usable VRAM ONLY. Works with NetBSD, may crash and burn on other OSes.
      */
     pCg6->vidmem = 2 * 1024 * 1024;
+
+    prom = sparcPromInit();
+    b = sparcPromGetProperty(&psdp->node, "vmsize", &len);
+    if (len == 4 && b != NULL) {
+       memcpy(&vmsize, b, 4);
+       pCg6->vidmem = vmsize * 1024 * 1024;    
+    }
+
+    if (prom)
+       sparcPromClose();
+
     pCg6->fb = xf86MapSbusMem(psdp, CG6_RAM_VOFF, pCg6->vidmem);
     
     if (pCg6->fb == NULL) {