[PATCH u-boot-mvebu v2 2/3] arm: mvebu: a37xx: Map CCI-400 and AP BootROM address space

[Pali Rohár]

In function build_mem_map() prepare also mapping for CCI-400 and
BootROM windows.

BootROM window is 1 MB long and by default starts at address 0xfff00000.
A53 AP BootROM is 16 kB long and repeats in this BootROM window 64 times.
RVBAR_EL3 register is set to value 0xffff0000, so by default A53 AP BootROM
is accessed via range 0xffff0000-0xffff3fff.

CCI-400 window when new TF-A version is used, starts at address 0xfe000000
and when old TF-A version is used, starts at address 0xd8000000.

Physical addresses are read directly from mvebu registers, so if TF-A
remaps it in future (again) then it would not cause any issue for U-Boot.

Signed-off-by: Pali Rohár <pali at kernel.org>

---
Changes in v2:
* Use SZ_* macros for sizes
* Fix size of BootROM window
* Fix commit message about 1 MB BootROM window vs 16 kB BootROM code
---
 arch/arm/mach-mvebu/armada3700/cpu.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mvebu/armada3700/cpu.c b/arch/arm/mach-mvebu/armada3700/cpu.c
index 57a811b36ac6..e9bdc181ef02 100644
--- a/arch/arm/mach-mvebu/armada3700/cpu.c
+++ b/arch/arm/mach-mvebu/armada3700/cpu.c
@@ -13,6 +13,7 @@
 #include <asm/global_data.h>
 #include <linux/bitops.h>
 #include <linux/libfdt.h>
+#include <linux/sizes.h>
 #include <asm/io.h>
 #include <asm/system.h>
 #include <asm/arch/cpu.h>
@@ -46,8 +47,10 @@
 #define MVEBU_CPU_DEC_WIN_REMAP(w)	(MVEBU_CPU_DEC_WIN_CTRL(w) + 0xc)
 #define MVEBU_CPU_DEC_WIN_GRANULARITY	16
 #define MVEBU_CPU_DEC_WINS		5
+#define MVEBU_CPU_DEC_CCI_BASE		(MVEBU_CPU_DEC_WIN_REG_BASE + 0xe0)
+#define MVEBU_CPU_DEC_ROM_BASE		(MVEBU_CPU_DEC_WIN_REG_BASE + 0xf4)
 
-#define MAX_MEM_MAP_REGIONS		(MVEBU_CPU_DEC_WINS + 2)
+#define MAX_MEM_MAP_REGIONS		(MVEBU_CPU_DEC_WINS + 4)
 
 #define A3700_PTE_BLOCK_NORMAL \
 	(PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_INNER_SHARE)
@@ -110,8 +113,26 @@ static int get_cpu_dec_win(int win, u32 *tgt, u32 *base, u32 *size)
 static void build_mem_map(void)
 {
 	int win, region;
+	u32 reg;
 
 	region = 1;
+
+	/* CCI-400 */
+	reg = readl(MVEBU_CPU_DEC_CCI_BASE);
+	mvebu_mem_map[region].phys = reg << 20;
+	mvebu_mem_map[region].virt = reg << 20;
+	mvebu_mem_map[region].size = SZ_64K;
+	mvebu_mem_map[region].attrs = A3700_PTE_BLOCK_DEVICE;
+	++region;
+
+	/* AP BootROM */
+	reg = readl(MVEBU_CPU_DEC_ROM_BASE);
+	mvebu_mem_map[region].phys = reg << 20;
+	mvebu_mem_map[region].virt = reg << 20;
+	mvebu_mem_map[region].size = SZ_1M;
+	mvebu_mem_map[region].attrs = A3700_PTE_BLOCK_NORMAL;
+	++region;
+
 	for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) {
 		u32 base, tgt, size;
 		u64 attrs;
-- 
2.20.1