feat(msm8916): initial platform port

Introduce the bare mimimum base of the msm8916 BL31 port. This is
pretty much just a standard platform "skeleton" with CPU/memory
initialization and an UART driver. This allows booting into
e.g. U-Boot with working UART output.

Note that the plat/qti/msm8916 port is completely separate and does not
make use of anything in plat/qti/common at the moment. The main reason
for that is that plat/qti/common is heavily focused around having a
binary "qtiseclib" component, while the MSM8916 port is fully
open-source (and therefore somewhat limited to publicly documented
functionality).

In the future it might be possible to re-use some of the open-source
parts in plat/qti/common (e.g. spmi_arb.c or pm_ps_hold.c) but it's
not strictly required for the basic functionality supported so far.

Change-Id: I7b4375df0f947b3bd1e55b0b52b21edb6e6d175b
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
diff --git a/plat/qti/msm8916/include/msm8916_mmap.h b/plat/qti/msm8916/include/msm8916_mmap.h
new file mode 100644
index 0000000..1696b84
--- /dev/null
+++ b/plat/qti/msm8916/include/msm8916_mmap.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2021, Stephan Gerhold <stephan@gerhold.net>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef MSM8916_MMAP_H
+#define MSM8916_MMAP_H
+
+#define PCNOC_BASE		0x00000000
+#define PCNOC_SIZE		0x8000000	/* 128 MiB */
+#define APCS_BASE		0x0b000000
+#define APCS_SIZE		0x800000	/* 8 MiB */
+
+#define MPM_BASE		(PCNOC_BASE + 0x04a0000)
+#define MPM_PS_HOLD		(MPM_BASE + 0xb000)
+
+#define TLMM_BASE		(PCNOC_BASE + 0x1000000)
+#define TLMM_GPIO_CFG(n)	(TLMM_BASE + ((n) * 0x1000))
+
+#define GCC_BASE		(PCNOC_BASE + 0x1800000)
+
+#define BLSP_UART1_BASE		(PCNOC_BASE + 0x78af000)
+#define BLSP_UART2_BASE		(PCNOC_BASE + 0x78b0000)
+
+#define APCS_QGIC2_BASE		(APCS_BASE + 0x00000)
+#define APCS_QGIC2_GICD		(APCS_QGIC2_BASE + 0x0000)
+#define APCS_QGIC2_GICC		(APCS_QGIC2_BASE + 0x2000)
+#define APCS_BANKED_ACS		(APCS_BASE + 0x08000)
+#define APCS_BANKED_SAW2	(APCS_BASE + 0x09000)
+#define APCS_CFG		(APCS_BASE + 0x10000)
+#define APCS_GLB		(APCS_BASE + 0x11000)
+#define APCS_L2_SAW2		(APCS_BASE + 0x12000)
+#define APCS_QTMR		(APCS_BASE + 0x20000)
+#define APCS_ALIAS_ACS(cpu)	(APCS_BASE + 0x88000 + ((cpu) * 0x10000))
+#define APCS_ALIAS_SAW2(cpu)	(APCS_BASE + 0x89000 + ((cpu) * 0x10000))
+
+#endif /* MSM8916_MMAP_H */