[PATCH v2 7/9] ARM: rockchip: dmc: add rk3588_ram_sizes to get full ram size

[Michael Tretter <m.tretter@pengutronix.de>]

The PBL has to pass a full description of the SDRAM to OP-TEE to allow
OP-TEE to handle dynamic shared memory in the entire SDRAM. Thus, the
PBL needs to read the full memory configuration.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
---
Changes in v2:
- none
---
 arch/arm/mach-rockchip/dmc.c | 37 ++++++++++++++++++++++++++++++++++---
 include/mach/rockchip/dmc.h  |  2 ++
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-rockchip/dmc.c b/arch/arm/mach-rockchip/dmc.c
index 62a7ef8f1e38e989e84f08f6f4a6586be3e85532..260b8be9c7da9e8f83323822eab92a439ef4e2ef 100644
--- a/arch/arm/mach-rockchip/dmc.c
+++ b/arch/arm/mach-rockchip/dmc.c
@@ -171,11 +171,12 @@ resource_size_t rk3568_ram0_size(void)
 #define RK3588_PMUGRF_OS_REG4           0x210
 #define RK3588_PMUGRF_OS_REG5           0x214
 
-resource_size_t rk3588_ram0_size(void)
+size_t rk3588_ram_sizes(phys_addr_t *base, resource_size_t *size, size_t n)
 {
 	void __iomem *pmugrf = IOMEM(RK3588_PMUGRF_BASE);
 	u32 sys_reg2, sys_reg3, sys_reg4, sys_reg5;
-	resource_size_t size, size1, size2;
+	resource_size_t memsize, size1, size2;
+	size_t i = 0;
 
 	sys_reg2 = readl(pmugrf + RK3588_PMUGRF_OS_REG2);
 	sys_reg3 = readl(pmugrf + RK3588_PMUGRF_OS_REG3);
@@ -187,7 +188,37 @@ resource_size_t rk3588_ram0_size(void)
 
 	pr_info("%s() size1 = 0x%08llx, size2 = 0x%08llx\n", __func__, (u64)size1, (u64)size2);
 
-	size = min_t(resource_size_t, RK3588_INT_REG_START, size1 + size2);
+	memsize = size1 + size2;
+
+	base[i] = 0xa00000;
+	size[i] = min_t(resource_size_t, RK3588_INT_REG_START, memsize) - 0xa00000;
+	i++;
+
+	if (i < n && memsize > SZ_4G) {
+		base[i] = SZ_4G;
+		size[i] = min_t(unsigned long, DRAM_GAP1_START, memsize) - SZ_4G;
+		i++;
+	}
+	if (i < n && memsize > DRAM_GAP1_END) {
+		base[i] = DRAM_GAP1_END;
+		size[i] = min_t(unsigned long, DRAM_GAP2_START, memsize) - DRAM_GAP1_END;
+		i++;
+	}
+	if (i < n && memsize > DRAM_GAP2_END) {
+		base[i] = DRAM_GAP2_END;
+		size[i] = memsize - DRAM_GAP2_END;
+		i++;
+	}
+
+	return i;
+}
+
+resource_size_t rk3588_ram0_size(void)
+{
+	phys_addr_t base;
+	resource_size_t size;
+
+	rk3588_ram_sizes(&base, &size, 1);
 
 	return size;
 }
diff --git a/include/mach/rockchip/dmc.h b/include/mach/rockchip/dmc.h
index 3df9aa5e9c87857e9ac3994e0e40c60d8c91b0a4..bb5a5afd02417920446c729b96eeb90f1fa0ead0 100644
--- a/include/mach/rockchip/dmc.h
+++ b/include/mach/rockchip/dmc.h
@@ -87,4 +87,6 @@ resource_size_t rk3399_ram0_size(void);
 resource_size_t rk3568_ram0_size(void);
 resource_size_t rk3588_ram0_size(void);
 
+size_t rk3588_ram_sizes(phys_addr_t *base, resource_size_t *size, size_t n);
+
 #endif

-- 
2.39.5