148 lines
4.6 KiB
C++
148 lines
4.6 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** Apple/CHRP Open Firmware NVRAM partition definitions. */
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#ifndef OF_NVRAM_H
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#define OF_NVRAM_H
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#include <cinttypes>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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class NVram;
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/** ========== Apple Open Firmware 1.x/2.x partition definitions. ========== */
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#define OF_NVRAM_OFFSET 0x1800
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#define OF_NVRAM_SIG 0x1275
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#define OF_CFG_SIZE 0x800
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// OF Variable types
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enum {
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OF_VAR_TYPE_INT = 1, // integer
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OF_VAR_TYPE_STR = 2, // string
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OF_VAR_TYPE_FLG = 3, // boolean flag
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};
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typedef struct {
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uint16_t sig; // >nv.1275 partition signature (= 0x1275)
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uint8_t version; // >nv.version header version (= 5)
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uint8_t num_pages; // >nv.pages number of memory pages (= 8 pages 0x100 bytes each)
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uint16_t checksum; // >nv.checksum partition checksum
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uint16_t here; // >nv.here offset to the next free byte (offset of after last string length; = 0x185c)
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uint16_t top; // >nv.top offset to the last free byte (offset of string with lowest offset; < 0x2000)
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} OfConfigHdrAppl;
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/** ================== CHRP NVRAM partition definitions. ================== */
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/** CHRP NVRAM partition signatures. */
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enum {
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NVRAM_SIG_OF_CFG = 0x50, // of-config (unused in Power Macintosh)
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NVRAM_SIG_VPD = 0x52, // of-vpd (unused in Power Macintosh)
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NVRAM_SIG_DIAG = 0x5F, // diagnostics partition
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NVRAM_SIG_OF_ENV = 0x70, // common partition with OF environment vars
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NVRAM_SIG_ERR_LOG = 0x72, // post-err-log
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NVRAM_SIG_FREE = 0x7F, // free space
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NVRAM_SIG_MAC_OS = 0xA0, // APL,MacOS75
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};
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typedef struct {
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uint8_t sig; // partition signature, must be 0x70
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uint8_t checksum; // partition header checksum (sig, length & name)
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uint16_t length; // partition length in 16-byte blocks
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char name[12]; // null-terminated partition name
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} OfConfigHdrChrp;
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// - interface
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class OfConfigImpl {
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public:
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using config_dict = std::vector<std::pair<std::string, std::string>>;
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virtual ~OfConfigImpl() = default;
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virtual bool validate() = 0;
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virtual const config_dict& get_config_vars() = 0;
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virtual bool set_var(std::string& name, std::string& val) = 0;
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};
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// Old World implementation
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class OfConfigAppl : public OfConfigImpl {
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public:
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OfConfigAppl(NVram* nvram_obj) { this->nvram_obj = nvram_obj; };
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~OfConfigAppl() = default;
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bool validate();
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const config_dict& get_config_vars();
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bool set_var(std::string& var_name, std::string& value);
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protected:
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uint16_t checksum_partition();
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void update_partition();
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private:
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NVram* nvram_obj = nullptr;
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uint8_t buf[OF_CFG_SIZE];
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int size = 0;
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config_dict _config_vars;
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};
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// New World implementation
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class OfConfigChrp : public OfConfigImpl {
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public:
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OfConfigChrp(NVram* nvram_obj) { this->nvram_obj = nvram_obj; };
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~OfConfigChrp() = default;
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bool validate();
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const config_dict& get_config_vars();
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bool set_var(std::string& var_name, std::string& value);
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protected:
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uint8_t checksum_hdr(const uint8_t* data);
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bool update_partition();
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private:
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NVram* nvram_obj = nullptr;
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uint8_t buf[4096];
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unsigned data_offset = 0; // offset to the OF config data
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unsigned data_length = 0; // length of the OF config data
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config_dict _config_vars;
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};
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class OfConfigUtils {
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public:
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OfConfigUtils() = default;
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~OfConfigUtils() = default;
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int init();
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void printenv();
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void setenv(std::string var_name, std::string value);
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protected:
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bool open_container();
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private:
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std::unique_ptr<OfConfigImpl> cfg_impl = nullptr;
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NVram* nvram_obj = nullptr;
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};
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#endif // OF_NVRAM_H
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