Lines Matching +full:port +full:- +full:mapping +full:- +full:mode
9 The following documentation is relevant to 2.4.18-rmk6 and beyond.
20 2. Initialise one serial port.
28 ---------------------------
43 2. Initialise one serial port
44 -----------------------------
51 The boot loader should initialise and enable one serial port on the
53 which serial port it should use for the kernel console (generally
57 option to the kernel via the tagged lists specifying the port, and
60 Documentation/admin-guide/kernel-parameters.rst.
64 --------------------------
69 MANDATORY except for DT-only platforms
75 value to the kernel. (see linux/arch/arm/tools/mach-types). This
78 For DT-only platforms, the machine type will be determined by device
83 ------------------
95 --------------------------------
112 +-----------+
113 base -> | ATAG_CORE | |
114 +-----------+ |
116 +-----------+ |
118 +-----------+ v
127 -------------------------
140 by the kernel's low-memory mapping.
145 ------------------
155 low-memory mapping.
162 ---------------------------
180 When booting a raw (non-zImage) kernel the constraints are tighter.
182 to TEXT_OFFSET - PAGE_OFFSET.
186 - Quiesce all DMA capable devices so that memory does not get
190 - CPU register settings
192 - r0 = 0,
193 - r1 = machine type number discovered in (3) above.
194 - r2 = physical address of tagged list in system RAM, or
197 - CPU mode
202 CPU must be in SVC mode. (A special exception exists for Angel)
205 entered in HYP mode in order to enable the kernel to make full use of
207 unless the virtualisations are already in use by a pre-installed
210 If the kernel is not entered in HYP mode for any reason, it must be
211 entered in SVC mode.
213 - Caches, MMUs
221 If the kernel is entered in HYP mode, the above requirements apply to
222 the HYP mode configuration in addition to the ordinary PL1 (privileged
226 possible. Except for entering in HYP mode, the system configuration
230 - The boot loader is expected to call the kernel image by jumping
234 made in ARM state, even for a Thumb-2 kernel.
237 Cortex-M class CPUs, the entry must be made in Thumb state.