memory: omap-gpmc: Prevent mapping into 1st 16MB (bdd7e033) · Commits · 戴 / test

drivers/memory/omap-gpmc.c

+18 −6

Original line number	Diff line number	Diff line
		@@ -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;
		}