redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

memory: omap-gpmc: Prevent mapping into 1st 16MB 

We have been preventing mapping GPMC children in the
first 1MB but really it has to be the first 16MB as
the minimum GPMC partition size is 16MB.

Also print an error message if CS mapping fails
due to DT requesting address outside the GPMC
map.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
hifive-unleashed-5.1
Roger Quadros 2015-07-09 17:31:45 +03:00
parent 51735caad3
commit bdd7e033fe
1 changed files with 18 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/memory/omap-gpmc.c
View File

@ -94,6 +94,14 @@
#define GPMC_CS_SIZE 0x30
#define GPMC_BCH_SIZE 0x10
/*
* The first 1MB of GPMC address space is typically mapped to
* the internal ROM. Never allocate the first page, to
* facilitate bug detection; even if we didn't boot from ROM.
* As GPMC minimum partition size is 16MB we can only start from
* there.
*/
#define GPMC_MEM_START 0x1000000
#define GPMC_MEM_END 0x3FFFFFFF
#define GPMC_CHUNK_SHIFT 24 /* 16 MB */
@ -1297,12 +1305,7 @@ static void gpmc_mem_init(void)
{
int cs;
/*
* The first 1MB of GPMC address space is typically mapped to
* the internal ROM. Never allocate the first page, to
* facilitate bug detection; even if we didn't boot from ROM.
*/
gpmc_mem_root.start = SZ_1M;
gpmc_mem_root.start = GPMC_MEM_START;
gpmc_mem_root.end = GPMC_MEM_END;
/* Reserve all regions that has been set up by bootloader */
@ -1966,6 +1969,15 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
if (ret < 0) {
dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n",
cs, &res.start);
if (res.start < GPMC_MEM_START) {
dev_info(&pdev->dev,
"GPMC CS %d start cannot be lesser than 0x%x\n",
cs, GPMC_MEM_START);
} else if (res.end > GPMC_MEM_END) {
dev_info(&pdev->dev,
"GPMC CS %d end cannot be greater than 0x%x\n",
cs, GPMC_MEM_END);
}
goto err;
}