On Tue, Nov 14, 2017 at 09:37:19AM -0800, Tony Lindgren wrote: > * Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> [171114 06:34]: > > On Fri, Nov 10, 2017 at 07:36:20AM -0800, Tony Lindgren wrote: > > > * Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> [171110 06:34]: > > > > On Thu, Nov 09, 2017 at 07:26:10PM -0800, Tony Lindgren wrote: > > > > > +#define OMAP34XX_SRAM_PHYS 0x40200000 > > > > > +#define OMAP34XX_SRAM_VIRT 0xd0010000 > > > > > +#define OMAP34XX_SRAM_SIZE 0x10000 > > > > > > > > For my testing environment, vmalloc address space is started at > > > > roughly 0xe0000000 so 0xd0010000 would not be valid. > > > > > > Well we can map it anywhere we want, got any preferences? > > > > My testing environment is a beagle-(xm?) for QEMU. It is configured by > > CONFIG_VMSPLIT_3G=y so kernel address space is started at 0xc0000000. > > And, it has 512 MB memory so 0xc0000000 ~ 0xdff00000 is used for > > direct mapping. See below. > > > > [ 0.000000] Memory: 429504K/522240K available (11264K kernel code, > > 1562K rwdata, 4288K rodata, 2048K init, 405K bss, 27200K reserved, > > 65536K cma-reserved, 0K highmem) > > [ 0.000000] Virtual kernel memory layout: > > [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) > > [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) > > [ 0.000000] vmalloc : 0xe0000000 - 0xff800000 ( 504 MB) > > [ 0.000000] lowmem : 0xc0000000 - 0xdff00000 ( 511 MB) > > [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) > > [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) > > [ 0.000000] .text : 0xc0208000 - 0xc0e00000 (12256 kB) > > [ 0.000000] .init : 0xc1300000 - 0xc1500000 (2048 kB) > > [ 0.000000] .data : 0xc1500000 - 0xc1686810 (1563 kB) > > [ 0.000000] .bss : 0xc168fc68 - 0xc16f512c ( 406 kB) > > > > Therefore, if OMAP34XX_SRAM_VIRT is 0xd0010000, direct mapping is > > broken and the system doesn't work. I guess that we should use more > > stable address like as 0xf0000000. > > OK. Let's forget about adding static mappings and my earlier > patches to attempt to fix this. Below is what I now think we should > merge as a fix before merging Joonsoo's patches. Please all review > and test, adding Tero to Cc also. Okay. Then, this patch will be merged by yourself as a fix? I'm okay with either way. Just let me know. :) Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
